<?xml version="1.0" encoding="ISO-8859-1"?><article xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
<front>
<journal-meta>
<journal-id>2730-5066</journal-id>
<journal-title><![CDATA[Agrociencia Uruguay]]></journal-title>
<abbrev-journal-title><![CDATA[Agrocienc. Urug.]]></abbrev-journal-title>
<issn>2730-5066</issn>
<publisher>
<publisher-name><![CDATA[Facultad de Agronomía - Instituto de Nacional de Investigación Agropecuaria]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S2730-50662022000301304</article-id>
<article-id pub-id-type="doi">10.31285/agro.26.506</article-id>
<title-group>
<article-title xml:lang="en"><![CDATA[Guaraní Aquifer System sedimentary petrography of outcropping formations and hydrogeologic implications]]></article-title>
<article-title xml:lang="es"><![CDATA[Petrografía sedimentaria de las formaciones aflorantes del Sistema Acuífero Guaraní e implicancias hidrogeológicas]]></article-title>
<article-title xml:lang="pt"><![CDATA[Petrografia sedimentar das formações aflorantes do Sistema Aquífero Guarani e implicações hidrogeológicas]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Collazo]]></surname>
<given-names><![CDATA[P.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Pamoukaglhian]]></surname>
<given-names><![CDATA[K.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Chiglino]]></surname>
<given-names><![CDATA[L.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad de la República Facultad de Ciencias Instituto de Ciencias Geológicas]]></institution>
<addr-line><![CDATA[Montevideo ]]></addr-line>
<country>Uruguay</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Universidad de la República Centro Universitario Regional Este (CURE) ]]></institution>
<addr-line><![CDATA[ Treinta y Tres]]></addr-line>
<country>Uruguay</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>00</month>
<year>2022</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>00</month>
<year>2022</year>
</pub-date>
<volume>26</volume>
<numero>nspe1</numero>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.edu.uy/scielo.php?script=sci_arttext&amp;pid=S2730-50662022000301304&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.edu.uy/scielo.php?script=sci_abstract&amp;pid=S2730-50662022000301304&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.edu.uy/scielo.php?script=sci_pdf&amp;pid=S2730-50662022000301304&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract: Petrographic analyses are presented for the Rivera, Tacuarembó and Cuchilla Ombú formations, which constitute the outcropping Guaraní Aquifer System in the Rivera and Tacuarembó departments, Uruguay. Sedimentary petrography studies were carried out with the objective of qualitatively and quantitatively evaluate the porosity of sedimentary rocks. To determine the porosity in sandstones, the method of impregnation of petrographic thin sections followed by point-counting of total pore area and interconnected pore area was used. Clast and matrix composition was determined using both optical microscope and scanning electron microscope (SEM), with an energy dispersive X-ray analyzer (EDS) The study shows average values of total porosity of 17% and effective porosity of 14% for the Rivera and Cuchilla Ombú aquifer units and average value of total porosity of 15% and effective porosity of 9% for the Tacuarembó unit. There are compositional differences between sandstones of the Rivera and Tacuarembó formations, the former being essentially quartz-arenites and the latter predominantly subarkoses and sublithic arenites.]]></p></abstract>
<abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen: Se presentan análisis petrográficos de las Formaciones Rivera, Tacuarembó y Cuchilla Ombú, formaciones sedimentarias que integran el Sistema Acuífero Guaraní aflorante en los Departamentos de Rivera y Tacuarembó, Uruguay. Los estudios de petrografía sedimentaria se llevan a cabo con el objetivo de evaluar cualitativamente y cuantitativamente la porosidad de las rocas sedimentarias. Para determinar la porosidad en las areniscas, se utilizó el método de impregnación de cortes petrográficos con conteo de poros totales y conteo de poros interconectados. La composición de los clastos y de la matriz se determinó utilizando microscopio óptico y microscopio electrónico de barrido (SEM) con analizador de rayos X (EDS). El estudio arroja valores medios de porosidad total de 17% y de porosidad efectiva de 14% para las unidades acuíferas Rivera y Cuchilla Ombú y valor medio de porosidad total de 15% y de porosidad efectiva 9% para la unidad Tacuarembó. Hay diferencias composicionales entre areniscas de las Formaciones Rivera y Tacuarembó, las primeras son esencialmente cuarzoarenitas y las segundas predominantemente subarcosas y sublitarenitas.]]></p></abstract>
<abstract abstract-type="short" xml:lang="pt"><p><![CDATA[Resumo: São apresentadas análises petrográficas das Formações Rivera, Tacuarembó e Cuchila Ombú, formações que compõem o afloramento do Sistema Aquífero Guaraní nos Departamentos de Rivera e Tacuarembó, Uruguai. Os estudos de petrografia sedimentar são realizados com objetivo de avaliar qualitativa e quantitativamente a porosidade das rochas sedimentares. Para a determinação da porosidade, foi utilizado o método de impregnação de cortes petrográficos com contagem total de poros e contagem de poros interligados. A composição dos clastos e da matriz é determinada usando um microscópio óptico e um microscópio eletrônico de varredura (SEM) com um analisador de energia dispersa de raios-X (EDS). O estudo apresenta valores médios de porosidade total de 17% e porosidade efetiva de 14% para as unidades dos aquíferos Rivera e Cuchilla Ombú e valores médios de porosidade total de 15% e porosidade efetiva de 9% para a unidade de Tacuarembó. Quanto às diferenças composicionais entre arenitos das Formações Rivera e Tacuarembó, as primeiras são essencialmente quartzo-arenitos e as últimas são predominantemente subarcóseos e sublitarenitos.]]></p></abstract>
<kwd-group>
<kwd lng="en"><![CDATA[Guaraní aquifer]]></kwd>
<kwd lng="en"><![CDATA[porosity]]></kwd>
<kwd lng="en"><![CDATA[sedimentary petrography]]></kwd>
<kwd lng="en"><![CDATA[Mesozoic]]></kwd>
<kwd lng="es"><![CDATA[Acuífero Guaraní]]></kwd>
<kwd lng="es"><![CDATA[porosidad]]></kwd>
<kwd lng="es"><![CDATA[petrografía sedimentaria]]></kwd>
<kwd lng="es"><![CDATA[Mesozoico]]></kwd>
<kwd lng="pt"><![CDATA[Aqüífero Guarani]]></kwd>
<kwd lng="pt"><![CDATA[porosidade]]></kwd>
<kwd lng="pt"><![CDATA[petrografia sedimentar]]></kwd>
<kwd lng="pt"><![CDATA[Mesozóico]]></kwd>
</kwd-group>
</article-meta>
</front><back>
<ref-list>
<ref id="B1">
<label>1.</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Montaño]]></surname>
<given-names><![CDATA[J]]></given-names>
</name>
<name>
<surname><![CDATA[Da Rosa Filho]]></surname>
<given-names><![CDATA[E]]></given-names>
</name>
<name>
<surname><![CDATA[Hindi]]></surname>
<given-names><![CDATA[E]]></given-names>
</name>
<name>
<surname><![CDATA[Cicalese]]></surname>
<given-names><![CDATA[H]]></given-names>
</name>
<name>
<surname><![CDATA[Montaño]]></surname>
<given-names><![CDATA[M]]></given-names>
</name>
<name>
<surname><![CDATA[Gagliardi]]></surname>
<given-names><![CDATA[S]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Importancia de las estructuras geológicas en el modelo conceptual del Sistema Acuífero Guaraní - Area Uruguaya]]></article-title>
<source><![CDATA[Águas subter]]></source>
<year>2002</year>
<volume>16</volume>
<page-range>111-9</page-range></nlm-citation>
</ref>
<ref id="B2">
<label>2.</label><nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Montaño]]></surname>
<given-names><![CDATA[J]]></given-names>
</name>
<name>
<surname><![CDATA[Tujchneider]]></surname>
<given-names><![CDATA[O]]></given-names>
</name>
<name>
<surname><![CDATA[Auge]]></surname>
<given-names><![CDATA[M]]></given-names>
</name>
<name>
<surname><![CDATA[Fili]]></surname>
<given-names><![CDATA[M]]></given-names>
</name>
<name>
<surname><![CDATA[Paris]]></surname>
<given-names><![CDATA[M]]></given-names>
</name>
<name>
<surname><![CDATA[D&#8217;Élia]]></surname>
<given-names><![CDATA[M]]></given-names>
</name>
<name>
<surname><![CDATA[Pérez]]></surname>
<given-names><![CDATA[M]]></given-names>
</name>
<name>
<surname><![CDATA[Nagy]]></surname>
<given-names><![CDATA[MI]]></given-names>
</name>
<name>
<surname><![CDATA[Collazo]]></surname>
<given-names><![CDATA[P]]></given-names>
</name>
<name>
<surname><![CDATA[Decoud]]></surname>
<given-names><![CDATA[P]]></given-names>
</name>
</person-group>
<source><![CDATA[Acuíferos regionales en América Latina: Sistema Acuífero Guaraní: Capítulo Argentino-Uruguayo]]></source>
<year>1998</year>
<publisher-loc><![CDATA[Santa Fe ]]></publisher-loc>
<publisher-name><![CDATA[Universidad Nacional del Litoral]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B3">
<label>3.</label><nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Bossi]]></surname>
<given-names><![CDATA[J]]></given-names>
</name>
<name>
<surname><![CDATA[Navarro]]></surname>
<given-names><![CDATA[R]]></given-names>
</name>
</person-group>
<source><![CDATA[Geología del Uruguay]]></source>
<year>1991</year>
<publisher-loc><![CDATA[Montevideo ]]></publisher-loc>
<publisher-name><![CDATA[Universidad de la República]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B4">
<label>4.</label><nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Bossi]]></surname>
<given-names><![CDATA[J]]></given-names>
</name>
<name>
<surname><![CDATA[Ferrando]]></surname>
<given-names><![CDATA[L]]></given-names>
</name>
<name>
<surname><![CDATA[Montaña]]></surname>
<given-names><![CDATA[H]]></given-names>
</name>
<name>
<surname><![CDATA[Campal]]></surname>
<given-names><![CDATA[N]]></given-names>
</name>
<name>
<surname><![CDATA[Morales]]></surname>
<given-names><![CDATA[H]]></given-names>
</name>
<name>
<surname><![CDATA[Gancio]]></surname>
<given-names><![CDATA[F]]></given-names>
</name>
<name>
<surname><![CDATA[Schipilov]]></surname>
<given-names><![CDATA[A]]></given-names>
</name>
<name>
<surname><![CDATA[Piñeyro]]></surname>
<given-names><![CDATA[D]]></given-names>
</name>
<name>
<surname><![CDATA[Sprechmann]]></surname>
<given-names><![CDATA[P]]></given-names>
</name>
</person-group>
<source><![CDATA[Carta Geológica del Uruguay: escala 1/500.000]]></source>
<year>1998</year>
<publisher-loc><![CDATA[Montevideo ]]></publisher-loc>
<publisher-name><![CDATA[Facultad de Agronomía]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B5">
<label>5.</label><nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Ferrando]]></surname>
<given-names><![CDATA[LA]]></given-names>
</name>
<name>
<surname><![CDATA[Andreis]]></surname>
<given-names><![CDATA[RR]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Nueva estratigrafía en el Gondwana de Uruguay]]></article-title>
<source><![CDATA[Actas I Congreso Latinoamericano de Hidrocarburos]]></source>
<year>1986</year>
<page-range>295-323</page-range><publisher-loc><![CDATA[Buenos Aires ]]></publisher-loc>
<publisher-name><![CDATA[ARPEL]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B6">
<label>6.</label><nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Bossi]]></surname>
<given-names><![CDATA[J]]></given-names>
</name>
</person-group>
<source><![CDATA[Geología del Uruguay]]></source>
<year>1966</year>
<publisher-loc><![CDATA[Montevideo ]]></publisher-loc>
<publisher-name><![CDATA[Universidad de la República]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B7">
<label>7.</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Calisto]]></surname>
<given-names><![CDATA[V]]></given-names>
</name>
<name>
<surname><![CDATA[Piñeiro]]></surname>
<given-names><![CDATA[G]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[A large cockroach from the mesosaur-bearing Konservat-Lagerstätte (Mangrullo Formation), Late Paleozoic of Uruguay]]></article-title>
<source><![CDATA[PeerJ]]></source>
<year>2019</year>
<volume>7</volume>
</nlm-citation>
</ref>
<ref id="B8">
<label>8.</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Rocha-Campos]]></surname>
<given-names><![CDATA[AC]]></given-names>
</name>
<name>
<surname><![CDATA[Basei]]></surname>
<given-names><![CDATA[MAS]]></given-names>
</name>
<name>
<surname><![CDATA[Nutman]]></surname>
<given-names><![CDATA[AP]]></given-names>
</name>
<name>
<surname><![CDATA[Santos]]></surname>
<given-names><![CDATA[PR]]></given-names>
</name>
<name>
<surname><![CDATA[Passarelli]]></surname>
<given-names><![CDATA[CR]]></given-names>
</name>
<name>
<surname><![CDATA[Canile]]></surname>
<given-names><![CDATA[FM]]></given-names>
</name>
<name>
<surname><![CDATA[Rosa]]></surname>
<given-names><![CDATA[OCR]]></given-names>
</name>
<name>
<surname><![CDATA[Fernandes]]></surname>
<given-names><![CDATA[MT]]></given-names>
</name>
<name>
<surname><![CDATA[De Santa Ana]]></surname>
<given-names><![CDATA[H]]></given-names>
</name>
<name>
<surname><![CDATA[Veroslavsky]]></surname>
<given-names><![CDATA[G]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[U-Pb zircon dating of ash fall deposits from the paleozoic Paraná basin of Brazil and Uruguay: a reevaluation of the stratigraphic correlations]]></article-title>
<source><![CDATA[J Geol]]></source>
<year>2019</year>
<volume>127</volume>
<numero>2</numero>
<issue>2</issue>
<page-range>167-82</page-range></nlm-citation>
</ref>
<ref id="B9">
<label>9.</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Ernesto]]></surname>
<given-names><![CDATA[M]]></given-names>
</name>
<name>
<surname><![CDATA[Nuñez]]></surname>
<given-names><![CDATA[P]]></given-names>
</name>
<name>
<surname><![CDATA[Xavier]]></surname>
<given-names><![CDATA[P]]></given-names>
</name>
<name>
<surname><![CDATA[Sanchez]]></surname>
<given-names><![CDATA[L]]></given-names>
</name>
<name>
<surname><![CDATA[Schultz]]></surname>
<given-names><![CDATA[C]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Age constraints on the Paleozoic Yaguarí-Buena Vista succession from Uruguay: paleomagnetic and paleontologic information]]></article-title>
<source><![CDATA[J S Am Earth Sci]]></source>
<year>2020</year>
<volume>98</volume>
<numero>102489</numero>
<issue>102489</issue>
<page-range>1-13</page-range></nlm-citation>
</ref>
<ref id="B10">
<label>10.</label><nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[De Santa Ana]]></surname>
<given-names><![CDATA[H]]></given-names>
</name>
</person-group>
<source><![CDATA[Analise Tectono-estratigrafico das Sequencas Permotriassica e Jurocretacea da Bacia Chacoparanaense Uruguaia (Cuenca Norte)]]></source>
<year>2004</year>
<publisher-loc><![CDATA[Rio Claro (BR) ]]></publisher-loc>
<publisher-name><![CDATA[Universidade Estadual Paulista]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B11">
<label>11.</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Braun]]></surname>
<given-names><![CDATA[A]]></given-names>
</name>
<name>
<surname><![CDATA[Sprechmann]]></surname>
<given-names><![CDATA[P]]></given-names>
</name>
<name>
<surname><![CDATA[Gaucher]]></surname>
<given-names><![CDATA[C]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Stratigraphic age of phosphorite-nodules from the San Gregorio Formation of Uruguay]]></article-title>
<source><![CDATA[Neues Jahrb Geol]]></source>
<year>2003</year>
<numero>12</numero>
<issue>12</issue>
<page-range>739-48</page-range></nlm-citation>
</ref>
<ref id="B12">
<label>12.</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Guerra-Sommer]]></surname>
<given-names><![CDATA[M]]></given-names>
</name>
<name>
<surname><![CDATA[Cazzulo-Klepzig]]></surname>
<given-names><![CDATA[M]]></given-names>
</name>
<name>
<surname><![CDATA[Formoso]]></surname>
<given-names><![CDATA[MLL]]></given-names>
</name>
<name>
<surname><![CDATA[Menegat]]></surname>
<given-names><![CDATA[R]]></given-names>
</name>
<name>
<surname><![CDATA[Fo]]></surname>
<given-names><![CDATA[JGM]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[U-Pb dating of tonstein layers from a coal succession of the southern Paraná Basin (Brazil): a new geochronological approach]]></article-title>
<source><![CDATA[Gondwana Res]]></source>
<year>2008</year>
<volume>14</volume>
<numero>3</numero>
<issue>3</issue>
<page-range>474-82</page-range></nlm-citation>
</ref>
<ref id="B13">
<label>13.</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Net]]></surname>
<given-names><![CDATA[I]]></given-names>
</name>
<name>
<surname><![CDATA[Limarino]]></surname>
<given-names><![CDATA[O]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Caracterización y origen de la porosidad en areniscas de la sección inferior del Grupo Paganzo (Carbonífero superior), Cuenca Paganzo, Argentina]]></article-title>
<source><![CDATA[Lat Am J Sedimentol Basin Anal]]></source>
<year>2000</year>
<volume>7</volume>
<page-range>49-72</page-range></nlm-citation>
</ref>
<ref id="B14">
<label>14.</label><nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Collazo]]></surname>
<given-names><![CDATA[P]]></given-names>
</name>
</person-group>
<source><![CDATA[Investigación hidrogeológica del Acuífero Guaraní en el área aflorante de los departamentos de Rivera y Tacuarembó, Uruguay]]></source>
<year>2006</year>
<publisher-loc><![CDATA[Buenos Aires (AR) ]]></publisher-loc>
<publisher-name><![CDATA[Universidad de Buenos Aires, Facultad de Ciencias Exactas y Naturales]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B15">
<label>15.</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Walther]]></surname>
<given-names><![CDATA[K]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Líneas fundamentales de la estructura geológica de la República Oriental del Uruguay]]></article-title>
<source><![CDATA[Revista del Instituto Nacional de Agronomía de Montevideo]]></source>
<year>1918</year>
<numero>3</numero>
<issue>3</issue>
<page-range>3-184</page-range></nlm-citation>
</ref>
<ref id="B16">
<label>16.</label><nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Falconer]]></surname>
<given-names><![CDATA[J]]></given-names>
</name>
</person-group>
<source><![CDATA[Terrenos Gondwánicos del Departamento de Tacuarembó: memoria explicativa del mapa geológico]]></source>
<year>1931</year>
<publisher-loc><![CDATA[Montevideo ]]></publisher-loc>
<publisher-name><![CDATA[Instituto de Geología y Perforaciones]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B17">
<label>17.</label><nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Bossi]]></surname>
<given-names><![CDATA[J]]></given-names>
</name>
<name>
<surname><![CDATA[Ferrando]]></surname>
<given-names><![CDATA[LA]]></given-names>
</name>
<name>
<surname><![CDATA[Fernández]]></surname>
<given-names><![CDATA[A]]></given-names>
</name>
<name>
<surname><![CDATA[Elizalde]]></surname>
<given-names><![CDATA[G]]></given-names>
</name>
<name>
<surname><![CDATA[Morales]]></surname>
<given-names><![CDATA[H]]></given-names>
</name>
<name>
<surname><![CDATA[Ledesma]]></surname>
<given-names><![CDATA[J]]></given-names>
</name>
<name>
<surname><![CDATA[Carballo]]></surname>
<given-names><![CDATA[E]]></given-names>
</name>
<name>
<surname><![CDATA[Medina]]></surname>
<given-names><![CDATA[E]]></given-names>
</name>
<name>
<surname><![CDATA[Ford]]></surname>
<given-names><![CDATA[I]]></given-names>
</name>
<name>
<surname><![CDATA[Montaña]]></surname>
<given-names><![CDATA[J]]></given-names>
</name>
</person-group>
<source><![CDATA[Carta Geológica del Uruguay: escala 1:1.000.000]]></source>
<year>1975</year>
<publisher-loc><![CDATA[Montevideo ]]></publisher-loc>
<publisher-name><![CDATA[MAP]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B18">
<label>18.</label><nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Sprechmann]]></surname>
<given-names><![CDATA[P]]></given-names>
</name>
<name>
<surname><![CDATA[Bossi]]></surname>
<given-names><![CDATA[J]]></given-names>
</name>
<name>
<surname><![CDATA[Da Silva]]></surname>
<given-names><![CDATA[J]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Cuencas del Jurásico y Cretácico del Uruguay]]></article-title>
<person-group person-group-type="editor">
<name>
<surname><![CDATA[Volkheimer]]></surname>
<given-names><![CDATA[W]]></given-names>
</name>
<name>
<surname><![CDATA[Musacchio]]></surname>
<given-names><![CDATA[EA]]></given-names>
</name>
</person-group>
<source><![CDATA[Cuencas sedimentarias del Jurásico y Cretácico de América del Sur]]></source>
<year>1981</year>
<page-range>239-70</page-range><publisher-loc><![CDATA[Buenos Aires ]]></publisher-loc>
<publisher-name><![CDATA[Comité Sudamericano del Jurásico y Cretácico]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B19">
<label>19.</label><nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Montaña]]></surname>
<given-names><![CDATA[J]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Memoria explicativa del fotoplano: Cuchilla del Ombu (H-12)]]></article-title>
<collab>Ministerio de Ganadería, Agricultura y Pesca, DINAMIGE (UY)</collab>
<source><![CDATA[Carta Geológica del Uruguay a escala: 1:100.000]]></source>
<year>1990</year>
<publisher-loc><![CDATA[Montevideo ]]></publisher-loc>
<publisher-name><![CDATA[MIE]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B20">
<label>20.</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Perea]]></surname>
<given-names><![CDATA[D]]></given-names>
</name>
<name>
<surname><![CDATA[Ubilla]]></surname>
<given-names><![CDATA[M]]></given-names>
</name>
<name>
<surname><![CDATA[Rojas]]></surname>
<given-names><![CDATA[A]]></given-names>
</name>
<name>
<surname><![CDATA[Goso]]></surname>
<given-names><![CDATA[C]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[The West Gondwanan occurrence of the hybodontid shark Priohybodus, and the late Jurassic-Early cretaceous age of Tacuarembó Formation, Uruguay]]></article-title>
<source><![CDATA[Paleontology]]></source>
<year>2001</year>
<volume>44</volume>
<numero>6</numero>
<issue>6</issue>
<page-range>1227-35</page-range></nlm-citation>
</ref>
<ref id="B21">
<label>21.</label><nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Ferrando]]></surname>
<given-names><![CDATA[L]]></given-names>
</name>
<name>
<surname><![CDATA[Montaña]]></surname>
<given-names><![CDATA[J]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Hipótesis Preliminar sobre la evolución paleogeográfica de la Cuenca de Paraná en Uruguay]]></article-title>
<source><![CDATA[Atas do III Simposio Sul-Brasileiro de Geologia]]></source>
<year>1987</year>
<page-range>393-400</page-range><publisher-loc><![CDATA[Curitiba ]]></publisher-loc>
<publisher-name><![CDATA[Sociedade Brasileira de Geologia]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B22">
<label>22.</label><nlm-citation citation-type="journal">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Goñi]]></surname>
<given-names><![CDATA[J]]></given-names>
</name>
<name>
<surname><![CDATA[Delaney]]></surname>
<given-names><![CDATA[P]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Estudio Estadistico dos minerais pesados da formaçao Botucatú]]></article-title>
<source><![CDATA[Boletín de la Universidad de Paraná]]></source>
<year>1961</year>
<numero>6</numero>
<issue>6</issue>
<page-range>1-27</page-range></nlm-citation>
</ref>
<ref id="B23">
<label>23.</label><nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[De Santa Ana]]></surname>
<given-names><![CDATA[H]]></given-names>
</name>
</person-group>
<source><![CDATA[Análise Tectono-Estratigáfica das Secuencias Permotriasica e Jurocretácea da Bacia Chacoparanaense Uruguaya]]></source>
<year>2004</year>
<publisher-loc><![CDATA[Rio Claro (BR) ]]></publisher-loc>
<publisher-name><![CDATA[Universidade Estadual Paulista]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B24">
<label>24.</label><nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Montaño]]></surname>
<given-names><![CDATA[M]]></given-names>
</name>
<name>
<surname><![CDATA[Montaño]]></surname>
<given-names><![CDATA[J]]></given-names>
</name>
<name>
<surname><![CDATA[Gaucher]]></surname>
<given-names><![CDATA[C]]></given-names>
</name>
<name>
<surname><![CDATA[Gagliardi]]></surname>
<given-names><![CDATA[S]]></given-names>
</name>
<name>
<surname><![CDATA[Collazo]]></surname>
<given-names><![CDATA[P]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Estudio hidrogeológico del SAG en los alrededores de la ciudad de Tacuarembó, Uruguay]]></article-title>
<source><![CDATA[III Seminario Hispano-Latinoamericano de Temas Actuales de la Hidrología Subterránea]]></source>
<year>2007</year>
<page-range>1-13</page-range><publisher-loc><![CDATA[Paraná ]]></publisher-loc>
<publisher-name><![CDATA[Universidad Nacional de Entre Ríos]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B25">
<label>25.</label><nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Féraud]]></surname>
<given-names><![CDATA[G]]></given-names>
</name>
<name>
<surname><![CDATA[Bertrand]]></surname>
<given-names><![CDATA[H]]></given-names>
</name>
<name>
<surname><![CDATA[Martínez]]></surname>
<given-names><![CDATA[M]]></given-names>
</name>
<name>
<surname><![CDATA[Ures]]></surname>
<given-names><![CDATA[C]]></given-names>
</name>
<name>
<surname><![CDATA[Schipilov]]></surname>
<given-names><![CDATA[A]]></given-names>
</name>
<name>
<surname><![CDATA[Bossi]]></surname>
<given-names><![CDATA[J]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[40Ar-39Ar age and geochemistry of the southern extension of Paraná traps in Uruguay]]></article-title>
<source><![CDATA[Actas II Simposio Sudamericano de Geología Isotópica = II South American Symposium on Isotope Geology; 1999, Córdoba, Argentina]]></source>
<year>1999</year>
<page-range>57-9</page-range><publisher-loc><![CDATA[Co&#769;rdoba ]]></publisher-loc>
<publisher-name><![CDATA[Subsecretari&#769;a de Mineri&#769;a de la Nacio&#769;n]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B26">
<label>26.</label><nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Dickinson]]></surname>
<given-names><![CDATA[WR]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Interpreting provenance relations from detrital modes of sandstones]]></article-title>
<person-group person-group-type="editor">
<name>
<surname><![CDATA[Zuffa]]></surname>
<given-names><![CDATA[GG]]></given-names>
</name>
</person-group>
<source><![CDATA[Provenance of Arenites]]></source>
<year>1985</year>
<page-range>333-61</page-range><publisher-loc><![CDATA[Dordrecht ]]></publisher-loc>
<publisher-name><![CDATA[D. Reidel Pub]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B27">
<label>27.</label><nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Custodio]]></surname>
<given-names><![CDATA[E]]></given-names>
</name>
<name>
<surname><![CDATA[Llamas]]></surname>
<given-names><![CDATA[E]]></given-names>
</name>
</person-group>
<source><![CDATA[Hidrogeología Subterránea]]></source>
<year>1983</year>
<publisher-loc><![CDATA[España ]]></publisher-loc>
<publisher-name><![CDATA[Omega]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B28">
<label>28.</label><nlm-citation citation-type="book">
<collab>Rock-Color Chart Committee</collab>
<source><![CDATA[Rock Color Chart]]></source>
<year>1951</year>
<publisher-loc><![CDATA[New York ]]></publisher-loc>
<publisher-name><![CDATA[Geological Society of America]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B29">
<label>29.</label><nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Silva Busso]]></surname>
<given-names><![CDATA[A]]></given-names>
</name>
</person-group>
<source><![CDATA[Contribución al Conocimiento Geológico e Hidrogeológico del Sistema Acuífero Termal de la Cuenca Chacoparanaense Oriental Argentina]]></source>
<year>1999</year>
<publisher-loc><![CDATA[Buenos Aires (AR) ]]></publisher-loc>
<publisher-name><![CDATA[Universidad de Buenos Aires, Facultad de Ciencias Exactas y Naturales]]></publisher-name>
</nlm-citation>
</ref>
<ref id="B30">
<label>30.</label><nlm-citation citation-type="book">
<person-group person-group-type="author">
<name>
<surname><![CDATA[Aguirre]]></surname>
<given-names><![CDATA[C]]></given-names>
</name>
<name>
<surname><![CDATA[Ibañez]]></surname>
<given-names><![CDATA[S]]></given-names>
</name>
<name>
<surname><![CDATA[Ferraresi]]></surname>
<given-names><![CDATA[P]]></given-names>
</name>
<name>
<surname><![CDATA[Rodriguez]]></surname>
<given-names><![CDATA[M]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Muestras de subsuelo y afloramientos]]></article-title>
<source><![CDATA[Avances en el Conocimiento del Sistema Acuífero Guaraní]]></source>
<year>2007</year>
<volume>Tomo 1, Vol. 5, Geología y geofísica</volume>
<publisher-loc><![CDATA[Buenos Aires ]]></publisher-loc>
<publisher-name><![CDATA[SAG]]></publisher-name>
</nlm-citation>
</ref>
</ref-list>
</back>
</article>
