The volcanism of the Jurassic chon Aike Silicic LIP influenced by Paleozoic inherited structures in the northeastern Deseado MASSIF, Patagonia

2021 ◽  
pp. 103611
Author(s):  
C. Navarrete
Keyword(s):  
Deseado Massif

Paleoenvironmental analysis of wet meadow in the Deseado Massif: Implications for the Holocene occupation of Argentinian Patagonia

The Holocene ◽  
2021 ◽  
pp. 095968362110259
Author(s):  
Bruno Mosquera ◽  
María V Mancini
Keyword(s):  
Environmental Changes ◽  
Low Energy ◽  
Semiarid Region ◽  
Human Occupation ◽  
Wet Meadow ◽  
Radiocarbon Dates ◽  
Sedimentation Environment ◽  
Dry Conditions ◽  
Paleoenvironmental Analysis ◽  
Deseado Massif

Paleoenvironmental data from wet-meadow environments in the arid-semiarid region of Patagonia are still incipient and the paleoenvironmental records came from pollen sequences of caves and rockshelters. The main reasons to study wetland records are their undisturbed (by humans) sedimentologic continuity, in contrast to deposits in rock shelters and caves; and their regional presentation of environmental changes that can be compared to archeological data. The aim of this paper is to evaluate the past hydrological dynamic of a wet-meadow from Deseado Massif and its relationship with the human occupation. For this purpose, we present the results of the sediment and pollen analysis of Mallín La Primavera wet-meadow that provide a sequence starting in the mid-Holocene. The results indicate a lower water table in the mallín prior to 6900 cal yr BP. Sediment analysis indicates low energy sedimentation environment with flood events and very low energy streams. Human occupational data show chronological discontinuities in mid-Holocene in several regions of Patagonia and the southern cone. In the studied region, two chronological hiatuses (7828–6434 cal yr BP and 3005–2710 cal yr BP) where recognized that appear to correlate with shrub steppes, indicating dry conditions. These conditions may explain the lack of archeological radiocarbon dates in the area during this period. The integration of sediment and pollen results from the Deseado Massif indicates dry and windy conditions for the middle Holocene. The lack of archeological radiocarbon dates would have been influenced by the loss of moisture in water sources such as springs and their associated wet meadows ( mallines).

scholarly journals Mesozoic Coleopteran Faunas from Argentina: Geological Context, Diversity, Taphonomic Observations, and Comparison with Other Fossil Insect Records

2012 ◽  
Vol 2012 ◽  
pp. 1-14 ◽  
Author(s):  
María Belén Lara ◽  
Oscar Florencio Gallego ◽  
Lara Vaz Tassi
Keyword(s):  
Late Jurassic ◽  
Middle Triassic ◽  
Late Triassic ◽  
Animal Kingdom ◽  
Fossil Insect ◽  
San Luis ◽  
Fundamental Information ◽  
The World ◽  
Geological Units ◽  
Deseado Massif

The order Coleoptera is the most diversified group of the Class Insecta and is the largest group of the Animal Kingdom. This contribution reviews the Mesozoic insects and especially the coleopteran records from Argentina, based on bibliographical and unpublished materials (86 described species, 526 collected specimens). The material came from different geological units from the late Middle Triassic to the Late Triassic (Bermejo, Cuyo, and Malargüe basins) to the Middle-Late Jurassic and Early Cretaceous (Deseado Massif, Cañadón Asfalto, and San Luís Basin). The coleopteran record is composed of 29 described species with 262 collected specimens (isolated elytra) mainly represented by Triassic species and only four specimens recorded in Jurassic units, all of them currently unpublished. These fossil coleopterans provide fundamental information about the evolution of insects in the Southern Hemisphere and confirm the Triassic Argentinean insect deposits to be among the most important in the world.

Lower to Middle Jurassic volcanism and Au–Ag mineralization at Cerro Moro District, Deseado Massif, Argentine Patagonia

2021 ◽  
pp. 103622
Author(s):  
Stephen J. Matthews ◽  
Mauricio Atampiz ◽  
Jesica R. Omar ◽  
Victor Valencia ◽  
Carlos Pérez de Arce ◽  
...  
Keyword(s):  
Middle Jurassic ◽  
Argentine Patagonia ◽  
Deseado Massif

Jurassic intraplate contraction of southern Patagonia: The El Tranquilo Anticline area, Deseado Massif

2019 ◽  
Vol 94 ◽  
pp. 102224 ◽  
Author(s):  
César Navarrete ◽  
Guido Gianni ◽  
Rodolfo Christiansen ◽  
Yanko Kamerbeek ◽  
Santiago Periale ◽  
...  
Keyword(s):  
Southern Patagonia ◽  
Deseado Massif

The basement of the Deseado Massif at Bahı́a Laura, Patagonia, Argentina: a proposal for its evolution

2004 ◽  
Vol 16 (7) ◽  
pp. 567-577 ◽  
Author(s):  
Diego M Guido ◽  
Mónica P Escayola ◽  
Isidoro B Schalamuk
Keyword(s):  
Deseado Massif

A new species of Notobatrachus (Amphibia, Salientia) from the Middle Jurassic of northwestern Patagonia

2008 ◽  
Vol 82 (2) ◽  
pp. 372-376 ◽  
Author(s):  
Ana Maria Báez ◽  
Laura Nicoli
Keyword(s):  
New Species ◽  
Geographical Distribution ◽  
Middle Jurassic ◽  
Northern Limit ◽  
Pterygoid Process ◽  
Early Diversification ◽  
Southern Patagonia ◽  
A New Species ◽  
Maxillary Arch ◽  
Deseado Massif

Notobatrachus degiustoi is the most completely known Jurassic frog and has been recorded in many outcrops of the La Matilde Formation of the Deseado Massif area in southern Patagonia. Herein, we erect a new species of the genus based on partially articulated remains collected from the Callovian Las Chacritas Member of the Cañadón Asfalto Formation, about 500 km northwest of the northern limit of the known geographical distribution of N. degiustoi. The new species differs from the latter in having a maxilla with a distinct pterygoid process and lacking teeth at least along the posterior two-thirds of its length, and a complete maxillary arch. We also provide an expanded diagnosis of Notobatrachus. This finding adds to our understanding of the early diversification of frogs.

First Glimpse of the Silicified Hot Spring Biota from a New Jurassic Chert Deposit in the Deseado Massif, Patagonia, Argentina

Ameghiniana ◽  
2016 ◽  
Vol 53 (2) ◽  
pp. 205-230 ◽  
Author(s):  
Juan García Massini ◽  
Ignacio H. Escapa ◽  
Diego M. Guido ◽  
Alan Channing
Keyword(s):  
Hot Spring ◽  
Deseado Massif

Geologic and tectonic setting of Deseado Massif epithermal deposits, Argentina, based on El Dorado-Monserrat

2005 ◽  
Vol 19 (4) ◽  
pp. 415-432 ◽  
Author(s):  
Leandro E. Echavarría ◽  
Isidoro B. Schalamuk ◽  
Ricardo O. Etcheverry
Keyword(s):  
Tectonic Setting ◽  
Epithermal Deposits ◽  
El Dorado ◽  
Deseado Massif
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