Systematic stress variations in the southern San Joaquin Valley and along the White Wolf fault: Implications for the rupture mechanics of the 1952Ms7.8 Kern County earthquake and contemporary seismicity

1995 ◽  
Vol 100 (B4) ◽  
pp. 6249-6264 ◽  
Author(s):  
David A. Castillo ◽  
Mark D. Zoback
Keyword(s):  
San Joaquin Valley ◽  
Kern County ◽  
Stress Variations

The Sigmocheirini, a xystodesmid milliped tribe in the Sierra Nevada Mountains, California, U.S.A. (Polydesmida: Xystodesmidae)

1995 ◽  
Vol 26 (3) ◽  
pp. 339-360 ◽  
Author(s):  
Rowland M. Shelley
Keyword(s):  
Sierra Nevada ◽  
New Genus ◽  
San Joaquin Valley ◽  
Western Slope ◽  
Kern County ◽  
Pigmentation Pattern ◽  
Sierra Nevada Mountains

AbstractThe xystodesmid milliped tribe Sigmocheirini occupies a band along the western slope of the Sierra Nevada Mountains and eastern fringe of the San Joaquin Valley from Placer to Kern counties, California. It is comprised of two genera, Sigmocheir Chamberlin, with three species occurring from Placer to Tulare counties, and the monotypic Ochthocelata gen. n., the sole component, O. adynata sp. n., occurring in northern Kern County. The species of Sigmocheir display a distinctive, trimaculate pigmentation pattern with yellow middorsal and paranotal spots; the coloration of O. adynata is unknown. Sigmocheir calaveras Chamberlin is a senior name for S. dohenyi Chamberlin, the spelling of which was subsequently corrected to danehyi and assigned to the new genus, Tuolumnia, a synonym of Sigmocheir. Sigmocheir furcata sp. n. is proposed for forms from the northern generic range. The southernmost species is S. maculifer (Chamberlin), comb. n., transferred from Harpaphe Cook. The Sigmocheirini are related to the sympatric tribe Xystocheirini; relationships within Sigmocheir are hypothesized as maculifer + (calaveras + furcata).

scholarly journals Early Differences in the Intensity of Alternate Bearing Among Selected Pistachio Genotypes

HortScience ◽  
2007 ◽  
Vol 42 (7) ◽  
pp. 1740-1743 ◽  
Author(s):  
Craig E. Kallsen ◽  
Dan E. Parfitt ◽  
Brent Holtz
Keyword(s):  
Similar Pattern ◽  
Female Parent ◽  
San Joaquin Valley ◽  
Breeding Program ◽  
Pistacia Vera ◽  
Kern County ◽  
Alternate Bearing ◽  
Breeding Programs ◽  
Old Trees

Alternate bearing (alternating years with high and low yields) is a prominent characteristic of ‘Kerman’ pistachio (Pistacia vera L.), the primary California cultivar. The degree of alternate bearing is described by alternate bearing index values from 0 (identical yields every year) to 1 (complete alternate bearing). Two separate and replicated trials designed to evaluate selections from a breeding program were conducted in the southwest (Kern County) and northeast (Madera County) areas of the San Joaquin Valley of California. Yields from the scion genotypes ‘Kerman’, ‘Golden Hills’, ‘Lost Hills’, ‘B5-8’, and ‘B19-1’ on PG1 rootstock were measured from 5- to 9-year-old trees in Kern County and from 5- to 7-year-old ‘Kerman’, ‘Golden Hills’, ‘Lost Hills’, and ‘B5-8’ trees on PG1 and UCB1 rootstock in Madera County. In Kern County, average annual yields among genotypes varied from a low of 208 to a high of 5273 kg·ha−1. Differences in the alternate bearing indices among genotypes were significant and ranged from 0.10 for ‘Lost Hills’ to 0.80 for ‘B19-1’. A similar pattern was observed for alternate bearing indices at the Madera County trial. In this younger trial, scion genotype had more influence on alternate bearing indices than did rootstock. Marked differences in the intensity of alternate bearing of young trees in these two trials suggest that alternate bearing might be amenable to selection in breeding programs. However, the observation that ‘B5-8’, with an alternate bearing index of 0.74, varied significantly from its female parent ‘Kerman’ at 0.36 suggests that inheritance is complex.

GEOPHYSICAL HISTORY OF THE TEN SECTION OIL FIELD, KERN COUNTY, CALIFORNIA

Geophysics ◽  
1947 ◽  
Vol 12 (3) ◽  
pp. 402-405
Author(s):  
Joseph C. Waterman
Keyword(s):  
San Joaquin Valley ◽  
Oil Field ◽  
Kern County ◽  
Upper Miocene ◽  
History Of ◽  
Well Data ◽  
Oil Company ◽  
Made In

The Ten Section oil field, generally regarded as the first geophysical oil field discovery in the San Joaquin Valley of California, was found by Shell Oil Company, Incorporated by means of a reflection seismograph survey made in 1934–1935. The discovery well, Shell Oil Company, Incorporated’s K. C. L.-Stevens A-1, was completed in June, 1936. A map presenting results of reflection shooting before discovery and one from well data with contours on the top of the productive Upper Miocene “Stevens” sand are shown.

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.

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