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Lajas Formation

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Journal Article
Journal: AAPG Bulletin
Published: 01 May 2018
AAPG Bulletin (2018) 102 (5): 885–912.
...Colleen Kurcinka; Robert W. Dalrymple; Marcello Gugliotta ABSTRACT The Middle Jurassic Lajas Formation in the Neuquén Basin of Argentina has been considered an ideal analog for tide-dominated deposits because of the widespread presence of tidal sedimentary structures and its heterolithic nature...
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Journal Article
Published: 01 March 2015
Journal of Sedimentary Research (2015) 85 (3): 265–284.
... is poorly constrained, leading to simplistic depositional models of delta-plain systems in the ancient record. Extensive exposures of the Middle Jurassic Lajas Formation permit the architecture, main stratigraphic surfaces, and lateral and vertical facies variations of crevasse subdelta deposits...
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Series: SEPM Special Publication
Published: 01 January 2007
DOI: 10.2110/pec.07.88.0195
EISBN: 9781565762909
...INTRODUCTION GEOLOGIC SETTING FIG. 1. Location of the study area and location of the Cuyo Group in relation to the faults that areinferred to have controlled subsidence in the “Lajas Embayment” during deposition of the Lajas Formation. The ichnologic study concentrates on the Sierra de...
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Journal Article
Published: 01 January 2005
Petroleum Geoscience (2005) 11 (1): 37–46.
... then be investigated using a range of petrophysical assumptions and producer and injector well configurations. Fig. 1 Location of the main oil fields in the Haltenbanken area offshore mid-Norway. Fig. 2 Lower Jurassic palaeogeography of Argentina with the main sedimentary basins. The Lajas Formation...
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Series: Geological Society, London, Special Publications
Published: 01 January 2005
DOI: 10.1144/GSL.SP.2005.252.01.05
EISBN: 9781862395008
... Abstract Tidal depositional systems are often interpreted as lowstand/transgressive estuarine deposits within sequences that are either wave or river dominated during highstand times. The Middle Jurassic Lajas Formation of the Neuquén Basin, Argentina, comprises 600 m of well-exposed tide...
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Image
Examples from the <span class="search-highlight">Lajas</span> <span class="search-highlight">Formation</span> of  Classopollis  tetrads with the four c...
Published: 24 May 2022
Fig. 3.— Examples from the Lajas Formation of Classopollis tetrads with the four categories counted for tetrads with malformed grains. Arrows point to malformed grains, in ‘4-n' all grains are malformed. A ) ‘1-n' tetrad. B ) ‘2-n' tetrad. C ) ‘3-n' tetrad. D ) ‘4-n' tetrad.
Image
Lower-delta-plain facies associations in the <span class="search-highlight">Lajas</span> <span class="search-highlight">Formation</span>.
Published: 01 March 2015
Table 1.— Lower-delta-plain facies associations in the Lajas Formation.
Journal Article
Published: 01 October 2007
Journal of Sedimentary Research (2007) 77 (10): 826–842.
...Fernando J. Gomez; Neil Ogle; Ricardo A. Astini; Robert M. Kalin Abstract The La Laja Formation (Early to Middle Cambrian) is one of the oldest units exposed at the base of the lower Paleozoic carbonate platform of the Argentina Precordillera. This is a key unit regarding the hypothesis...
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Journal Article
Published: 01 September 2014
Journal of Paleontology (2014) 88 (5): 906–924.
...Brian R. Pratt; Osvaldo L. Bordonaro A bstract A tectonically undeformed portion of the lower part of La Laja Formation is exposed at Cerro El Molle near San Juan, Precordillera of western Argentina. It consists of shallow-water, variably argillaceous lime mudstone and sporadically interbedded...
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Image
Detailed complete stratigraphic log of the La <span class="search-highlight">Laja</span> <span class="search-highlight">Formation</span>, at the La Laj...
Published: 01 October 2007
Figure 3 Detailed complete stratigraphic log of the La Laja Formation, at the La Laja reference section. The black triangles on top of each column indicate that the section continues.
Image
Simplified stratigraphic column of the La <span class="search-highlight">Laja</span> <span class="search-highlight">Formation</span> showing the main l...
Published: 01 October 2007
Figure 4 Simplified stratigraphic column of the La Laja Formation showing the main lithofacies and details of distinct lithofacies associations. See Table 1 and text for further details. The black triangles indicate the top of each Grand Cycle as proposed in Gomez and Astini (2006) .
Series: SEPM Gulf Coast Section Publications
Published: 01 November 1999
DOI: 10.5724/gcs.99.14.0121
EISBN: 978-0-9836097-1-1
... packages about 10 m thick (see Fig. 8 ). Interpretation A diverse range of facies deposited in the inter-subtidal zone have been identified in the Lajas Formation. These grade from unbioturbated mud-dominated facies with desiccation cracks and thin current-rippled sandstones into sand-dominated...
Journal Article
Journal: Palynology
Published: 23 January 2024
Palynology (2024) 48 (1): 2254364.
... us to begin to evaluate the palaeoecological significance of the recovered palynofloras and their importance in the evolution of these ecosystems, during the transition between the uppermost Cuyo Group and the lowermost Lotena Group. The Lajas Formation, characterised by the palynofacies type...
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(A) Deltaic sandstones stratified in upward-coarsening sequence of the <span class="search-highlight">Laja</span>...
Published: 15 December 2020
Figure 11. (A) Deltaic sandstones stratified in upward-coarsening sequence of the Lajas Formation (Middle Jurassic) and (B) composite log of the Lajas Formation. AT = resistivity log; BS = bit size; DTCO = acoustic log; GR = gamma-ray log; NPHI = neutron log; RHOZ = density log; SP = spontaneous
Series: AAPG Memoir
Published: 01 January 2012
DOI: 10.1306/13331525M983514
EISBN: 9781629810201
... patterns and accommodation signatures. The sedimentologic changes and associated unconformities mostly coincide with formational boundaries of the lithostratigraphic framework. Supersequence PC I (La Laja Formation, ∼500 m [∼1640 ft] thick) is composed of alternating fine-grained siliciclastic...
FIGURES
Journal Article
Published: 01 March 2012
Journal of Paleontology (2012) 86 (2): 273–281.
...), Diraphora sp., and an indeterminate bohemiellid. Brachiopods come from the lowermost part of the Precordilleran Cambrian succession (El Estero and Soldano Members of the La Laja Formation, Cerro Totora Formation) and from the Ancaucha olistolith within the Los Sombreros olistostrome. The associated...
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Journal Article
Published: 27 April 2017
Petroleum Geoscience (2017) 23 (4): 395–402.
... Jurassic, Lajas Formation of the Neuquén Basin, Argentina, demonstrate that canonical correspondence analysis can be used to consistently recognize facies and aid in the determination of depositional environments. This study demonstrates the link between depositional facies, grain-size distribution...
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Journal Article
Published: 06 October 2015
Journal of the Geological Society (2016) 173 (1): 94–107.
... successions. Large-scale outcrops from the Middle Jurassic Lajas Formation (Argentina) expose a well-constrained stratigraphic succession of marginal-marine deposits with a strong fluvial influence and well-known tidal indicators. The studied deposits show decimetre-scale interbedding of coarser- and finer...
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Journal Article
Published: 01 April 2007
Journal of Sedimentary Research (2007) 77 (4): 256–262.
..., the possibility of tsunamis is virtually never evaluated even though they might, indeed should, have been common in many regions. Portions of the Middle Cambrian La Laja Formation of the Argentine Precordillera formed in such a submerged epeiric platform or shelf. They comprise a suite of three limestone facies...
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Series: Geological Society, London, Special Publications
Published: 01 January 2005
DOI: 10.1144/GSL.SP.2005.252.01.13
EISBN: 9781862395008
... Abstract Silicified coniferous wood is commonly found in the Middle Jurassic (Bajocian) Lajas Formation of the Neuquén Basin, west-central Argentina. The wood is preserved in a succession of sandstones, siltstones, mudstones and minor conglomerates that represent deposition as part of tide...
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