scholarly journals Sediment provenance and dispersal of Neogene–Quaternary strata of the southeastern San Joaquin Basin and its transition into the southern Sierra Nevada, California

Geosphere ◽  
2016 ◽  
Vol 12 (6) ◽  
pp. 1744-1773 ◽  
Author(s):  
Jason Saleeby ◽  
Zorka Saleeby ◽  
Jason Robbins ◽  
Jan Gillespie
Keyword(s):  
Sierra Nevada ◽  
Sediment Provenance ◽  
San Joaquin Basin

scholarly journals Late Cenozoic structure and tectonics of the southern Sierra Nevada–San Joaquin Basin transition, California

Geosphere ◽  
2019 ◽  
Vol 15 (4) ◽  
pp. 1164-1205
Author(s):  
Jason Saleeby ◽  
Zorka Saleeby
Keyword(s):  
Sierra Nevada ◽  
Late Cretaceous ◽  
Fault System ◽  
Mantle Lithosphere ◽  
High Angle ◽  
Late Cenozoic ◽  
Sediment Reworking ◽  
Late Neogene ◽  
Early Neogene ◽  
San Joaquin Basin

AbstractThis paper presents a new synthesis for the late Cenozoic tectonic, paleogeographic, and geomorphologic evolution of the southern Sierra Nevada and adjacent eastern San Joaquin Basin. The southern Sierra Nevada and San Joaquin Basin contrast sharply, with the former constituting high-relief basement exposures and the latter constituting a Neogene marine basin with superposed low-relief uplifts actively forming along its margins. Nevertheless, we show that Neogene basinal conditions extended continuously eastward across much of the southern Sierra Nevada, and that during late Neogene–Quaternary time, the intra-Sierran basinal deposits were uplifted and fluvially reworked into the San Joaquin Basin. Early Neogene normal-sense growth faulting was widespread and instrumental in forming sediment accommodation spaces across the entire basinal system. Upon erosion of the intra-Sierran basinal deposits, structural relief that formed on the basement surface by the growth faults emerged as topographic relief. Such “weathered out” fossil fault scarps control much of the modern southern Sierra landscape. This Neogene high-angle fault system followed major Late Cretaceous basement structures that penetrated the crust and that formed in conjunction with partial loss of the region’s underlying mantle lithosphere. This left the region highly prone to surface faulting, volcanism, and surface uplift and/or subsidence transients during subsequent tectonic regimes. The effects of the early Neogene passage of the Mendocino Triple Junction were amplified as a result of the disrupted state of the region’s basement. This entailed widespread high-angle normal faulting, convecting mantle-sourced volcanism, and epeirogenic transients that were instrumental in sediment dispersal, deposition, and reworking patterns. Subsequent phases of epeirogenic deformation forced additional sediment reworking episodes across the southern Sierra Nevada–eastern San Joaquin Basin region during the late Miocene break-off and west tilt of the Sierra Nevada microplate and the Pliocene–Quaternary loss of the region’s residual mantle lithosphere that was left intact from the Late Cretaceous tectonic regime. These late Cenozoic events have left the high local-relief southern Sierra basement denuded of its Neogene basinal cover and emergent immediately adjacent to the eastern San Joaquin Basin and its eastern marginal uplift zone.

Geología de la transecta 8: El Palmar-cerro Corea. Sierra Nevada de Santa Marta

2008 ◽  
pp. 25-40
Author(s):  
Elizabeth Cortés Castillo ◽  
Julián Andrés López Isaza
Keyword(s):  
Sierra Nevada

Variedades de durazno (Prunus persica L.) intercaladas en el sistema milpa en la sierra nevada de Puebla, México

2019 ◽  
Vol 12 (9) ◽  
Author(s):  
Ernesto Hernández-Romero ◽  
Reyna Rojano-Hernández ◽  
Ricardo Mendoza-Robles ◽  
José. I. Cortés- Flores ◽  
Antonio N. Turrent-Fernández
Keyword(s):  
Sierra Nevada ◽  
Prunus Persica ◽  
El Sistema

En la Sierra Nevada de Puebla, México, los huertos de durazno (Prunus persica L.) presentan problemas de producción relacionados con alta incidencia de plagas (incluye enfermedades), nutrición deficiente e inadecuado manejo de poda, que acentúan el problema de floración precoz en la mayoría de las variedades mejoradas.

Transportation and the Environment

2017 ◽  
Vol 94 (3) ◽  
pp. 37-61
Author(s):  
Douglas R. Littlefield
Keyword(s):  
Nineteenth Century ◽  
San Francisco ◽  
Sierra Nevada ◽  
Mississippi River ◽  
San Joaquin Valley ◽  
Eastern United States ◽  
Major Health ◽  
San Joaquin River ◽  
Natural Wetlands ◽  
Prevailing View

Some histories of California describe nineteenth-century efforts to reclaim the extensive swamplands and shallow lakes in the southern part of California's San Joaquin Valley – then the largest natural wetlands habitat west of the Mississippi River – as a herculean venture to tame a boggy wilderness and turn the region into an agricultural paradise. Yet an 1850s proposition for draining those marshes and lakes primarily was a scheme to improve the state's transportation. Swampland reclamation was a secondary goal. Transport around the time of statehood in 1850 was severely lacking in California. Only a handful of steamboats plied a few of the state's larger rivers, and compared to the eastern United States, roads and railroads were nearly non-existent. Few of these modes of transportation reached into the isolated San Joaquin Valley. As a result, in 1857 the California legislature granted an exclusive franchise to the Tulare Canal and Land Company (sometimes known as the Montgomery franchise, after two of the firm's founders). The company's purpose was to connect navigable canals from the southern San Joaquin Valley to the San Joaquin River, which entered from the Sierra Nevada about half way up the valley. That stream, in turn, joined with San Francisco Bay, and thus the canals would open the entire San Joaquin Valley to world-wide commerce. In exchange for building the canals, the Montgomery franchise could collect tolls for twenty years and sell half the drained swamplands (the other half was to be sold by the state). Land sales were contingent upon the Montgomery franchise reclaiming the marshes. Wetlands in the mid-nineteenth century were not viewed as they are today as fragile wildlife habitats but instead as impediments to advancing American ideals and homesteads across the continent. Moreover, marshy areas were seen as major health menaces, with the prevailing view being that swampy regions’ air carried infectious diseases.

Biología y daños de Conotrachelus crataegi (Coleoptera: Curculionidae) en tejocote (Crataegus spp.) en México

2017 ◽  
Vol 43 (2) ◽  
pp. 173
Author(s):  
Martha Lilia Rosas-Alfaro ◽  
Arturo Huerta-de La Peña ◽  
Juan Morales-Jiménez ◽  
Andrés Pérez-Magaña ◽  
Luis Ricardo Hernández ◽  
...  
Keyword(s):  
Sierra Nevada

Conotrachelus crataegi es un curculiónido plaga que barrena los frutos de tejocote en la zona de producciónen Puebla, México. Las hembras ovipositan en frutos pequeños en desarrollo, donde la larva barrena hasta llegar y destruir las semillas. En ausencia de trabajos de investigación sobre biología y daños de este insecto en la región productora de tejocote, se estudió la biología de este barrenador y los daños sobre los frutos. Se realizaron muestreos al follaje, frutos y suelo en tres localidades de la Sierra Nevada de Puebla, México del 30 de abril de 2014 al 27 de mayo de 2015. C. crataegi presentó alto traslape de estados de desarrollo; los huevos se observaron desde la tercera semana de abril, hasta la segunda de julio de 2014, con un período estimado de incubación de tres a cinco días. Las larvas se registraron durante todo el período de muestreo, desde la primera semana de julio de 2014, hasta la última de mayo de 2015. El estado de pupa ocurrió en marzo y abril de 2014, con una duración de 10 a 15 días. Los adultos se observaron de abril a septiembre de 2014; las mayores densidades poblacionales de los adultos se presentaron el 28 de mayo y el 11 de junio de 2014. Los resultados de esta investigación contribuyen al diseño de un programa de manejo sustentable de C. crataegi en México.

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