scholarly journals Pre-Pliocene Extension around the Gulf of California and the transfer of Baja California to the Pacific Plate

Tectonics ◽  
1989 ◽  
Vol 8 (1) ◽  
pp. 99-115 ◽  
Author(s):  
J. M. Stock ◽  
K. V. Hodges
Keyword(s):  
Gulf Of California ◽  
Baja California ◽  
Pacific Plate ◽  
The Pacific

Serologically Differentiated Subpopulations of the Pacific Sardine, Sardinops caerulea

1964 ◽  
Vol 21 (4) ◽  
pp. 691-701 ◽  
Author(s):  
Andrew M. Vrooman
Keyword(s):  
Gulf Of California ◽  
Baja California ◽  
Frequency Of Occurrence ◽  
The Third ◽  
The Pacific ◽  
Pacific Sardine ◽  
Positive Factor ◽  
Outer Coast

Three genetically distinct subpopulations of the Pacific sardine have been differentiated by the frequency of occurrence of a C-positive blood factor. Two of these subpopulations, a northern and a southern one, live off the coast of California and the outer coast of Baja California, Mexico. The third group inhabits the Gulf of California. The C-positive factor occurred in 13.6% of the northern subpopulation, 6.0% of the southern, and 16.8% of the Gulf subpopulation.

scholarly journals New constraints on relative motion between the Pacific Plate and Baja California microplate (Mexico) from GPS measurements

2007 ◽  
Vol 170 (3) ◽  
pp. 1373-1380 ◽  
Author(s):  
C. Plattner ◽  
R. Malservisi ◽  
T. H. Dixon ◽  
P. LaFemina ◽  
G. F. Sella ◽  
...  
Keyword(s):  
Relative Motion ◽  
Baja California ◽  
Pacific Plate ◽  
Gps Measurements ◽  
The Pacific

scholarly journals Isotope geochemistry and petrogenesis of peralkaline Middle Miocene ignimbrites from central Sonora: relationship with continental break-up and the birth of the Gulf of California

2008 ◽  
Vol 179 (5) ◽  
pp. 453-464 ◽  
Author(s):  
Jesús R. Vidal Solano ◽  
Henriette Lapierre ◽  
Joann M. Stock ◽  
Alain Demant ◽  
Francisco A. Paz Moreno ◽  
...  
Keyword(s):  
Gulf Of California ◽  
Middle Miocene ◽  
Baja California ◽  
Isotope Geochemistry ◽  
Early Stage ◽  
Major Change ◽  
Crustal Material ◽  
Isotopic Signatures ◽  
The Pacific ◽  
Specific Stage

Abstract Middle Miocene peralkaline ignimbrites constitute a specific geodynamic marker of the early stage of opening of the Gulf of California, preserved either in central Sonora or the Puertecitos area, in Baja California. Very uniform ages (12-12.5 Ma) obtained on these rocks show that this volcanic episode corresponds to a specific stage in the tectonic evolution of the proto-gulf area. Field observations and slightly different Sr and Nd isotopic signatures support eruptions from several small volume magma batches rather than from a large-volume caldera forming event. Isotopic ratios help to constrain the petrogenesis of the peralkaline liquids by fractional crystallization of transitional basalts in a shallow reservoir, with slight contamination by Precambrian upper crustal material. Less differentiated glomeroporphyritic icelandites erupted at about 11 Ma, mark an increase in the magma production rate and highlight an easier access to the surface, illustrating an advanced stage in the weakening of the continental crust. The tilting of the Middle Tertiary sequences results from a major change in the tectonic regime, from E-W extension giving rise to N-S grabens, to NNW-SSE strike-slip motion that can be related to the transfer of Baja California from North America to the Pacific plate. The location of peralkaline volcanism coincides with the southern edge of the Precambrian crust and the southernmost extension of the California slab window at 12.5 Ma.

scholarly journals First record of Glycera guatemalensis and G. sphyrabrancha (Annelida: Glyceridae) from Western Mexico

2019 ◽  
Vol 67 (S5) ◽  
pp. S63-S69
Author(s):  
María Elena García-Garza ◽  
Iliana Torres-Manríquez ◽  
María Ana Tovar-Hernández ◽  
Jesús Angel De León-González
Keyword(s):  
Intertidal Zone ◽  
Gulf Of California ◽  
Baja California ◽  
First Record ◽  
Morphological Characters ◽  
Mexican Pacific ◽  
Western Mexico ◽  
Shrimp Trawl ◽  
The Pacific ◽  
Objective Evidence

Introduction: Glycerides, commonly called “blood worms”, are relatively thin polychaetes that reach considerable sizes. They have been reported for all the seas of the world from the intertidal zone to abyssal depths. Objective: Evidence the presence of two species of Glycera for the littorals of the Mexican Pacific. Methods: An analysis of the glycerides of the Pacific coast of Mexico was carried out, finding two species that were collected, one of shrimp trawl at a depth of 18 meters off Puertecitos, Baja California, as well as by manual sampling in the intertidal zone of Concepción Bay, Baja California Sur in the Gulf of California. For their taxonomic determination, morphological characters of greater relevance for their identification were examined, such as jaws, aileron shape, parapodia, chaetae, and the type of pharyngeal papillae. Results: We diagnosed and schematized Glycera guatemalensis Böggemann & Fiege, 2001 and Glycera sphyrabrancha Schmarda, 1861. Conclusions: Glycera guatemalensis described for Guatemala and Glycera sphyrabrancha described for Jamaica, are recorded for the first time for the Gulf of California.

scholarly journals Occurrence and Distribution of the Genus Jania J. V. Lamouroux (Corallinales, Rhodophyta) in the Pacific Coast of Baja California and Gulf of California, Mexico

2013 ◽  
Vol 04 (12) ◽  
pp. 1-13 ◽  
Author(s):  
Luz Elena Mateo-Cid ◽  
A. Catalina Mendoza-González ◽  
Luis E. Aguilar-Rosas ◽  
Raúl Aguilar-Rosas
Keyword(s):  
Gulf Of California ◽  
Baja California ◽  
Pacific Coast ◽  
The Pacific

scholarly journals Climate Change and Extreme Temperature Trends in the Baja California Peninsula, Mexico

2021 ◽  
Vol 14 ◽  
pp. 117862212110107
Author(s):  
Polioptro F Martínez-Austria ◽  
José Alejandro Jano-Pérez
Keyword(s):  
Climate Change ◽  
Gulf Of California ◽  
General Circulation ◽  
Baja California ◽  
Extreme Temperature ◽  
General Circulation Models ◽  
Baja California Peninsula ◽  
Temperature Trends ◽  
The Pacific ◽  
Maximum Temperatures

Climate change is one of the greatest threats that our civilization is facing because increases in extreme temperatures severely affect humans, the economy, and ecosystems. General circulation models, which adequately predict climate change around the world, are less accurate at regional levels. Therefore, trends must be locally assessed, particularly in regions such as the Baja California Peninsula, which is a thin mass of land surrounded by the Pacific Ocean and the Gulf of California. Herein, we discuss extreme temperature trends in the Baja California Peninsula and whether they are statistically significant based on the Spearman’s nonparametric statistical test. For these purposes, 18 weather stations covering the entire region were analyzed, revealing that maximum temperatures for the hottest months are rising at a rate that is consistent with the RCP 8.5 scenario. Changes in minimum temperatures were also analyzed.

Sign in / Sign up

Export Citation Format

Share Document