Modelling climate constraints on the formation of pluvial Lake Bonneville in the Great Basin, United States

2021 ◽  
Author(s):  
Bryce K. Belanger ◽  
William H. Amidon ◽  
Benjamin J. C. Laabs ◽  
Jeffrey S. Munroe ◽  
Brendon J. Quirk
Keyword(s):  
United States ◽  
Great Basin ◽  
Lake Bonneville

MODELING CLIMATE CONSTRAINTS ON THE FORMATION OF PLUVIAL LAKE BONNEVILLE IN THE GREAT BASIN, USA

2019 ◽  
Author(s):  
Bryce K. Belanger ◽  
◽  
William H. Amidon ◽  
Benjamin Laabs ◽  
Jeffrey S. Munroe
Keyword(s):  
Great Basin ◽  
Lake Bonneville

Impacts on ecosystems, corrective restoration practices, and prospects for recovery: nine case studies in the continental United States

2017 ◽  
Vol 39 (6) ◽  
pp. 431 ◽  
Author(s):  
T. A. Jones
Keyword(s):  
United States ◽  
Ecosystem Services ◽  
Chesapeake Bay ◽  
Case Studies ◽  
Great Basin ◽  
Mojave Desert ◽  
Flood Control ◽  
Colorado River ◽  
Longleaf Pine ◽  
Elwha River

Ecological restoration in the United States is growing in terms of the number, size, and diversity of projects. Such efforts are intended to ameliorate past environmental damage and to restore functioning ecosystems that deliver desired levels of ecosystem services. In nine current restoration case studies from across the continental United States, this paper details (1) the impacts of the original disturbance and compounding secondary issues that compel restoration, (2) the corrective practices applied to advance restoration goals, and (3) the prospects for recovery of ecosystem services, including those involving associated animal populations. Ecosystem-altering impacts include flood control (Kissimmee River), flood control and navigation (Atchafalaya Basin), damming for irrigation-water storage (Colorado River) and hydroelectric power (Elwha River), logging and fire suppression (longleaf pine forest), plant invasions that decrease fire-return intervals (Great Basin shrublands, Mojave Desert), nutrient and sediment loading of watersheds (Chesapeake Bay, Mississippi River delta), and conversion of natural lands to agriculture (tallgrass prairie). Animal species targeted for recovery include the greater sage-grouse (Great Basin shrublands), the red-cockaded woodpecker (longleaf pine forest), the south-western willow flycatcher (Colorado River and its tributaries), the desert tortoise (Mojave Desert), eight salmonid fish (Elwha River), and the blue crab and eastern oyster (Chesapeake Bay).

Late Pleistocene and early Holocene rivers and wetlands in the Bonneville basin of western North America

2003 ◽  
Vol 60 (2) ◽  
pp. 200-210 ◽  
Author(s):  
Charles G. Oviatt ◽  
David B. Madsen ◽  
Dave N. Schmitt
Keyword(s):  
Great Basin ◽  
Late Pleistocene ◽  
Theoretical Models ◽  
Coarse Sand ◽  
Early Holocene ◽  
River Channels ◽  
Human Occupation ◽  
Lake Bonneville ◽  
River Bed ◽  
Bonneville Basin

AbstractField investigations at Dugway Proving Ground in western Utah have produced new data on the chronology and human occupation of late Pleistocene and early Holocene lakes, rivers, and wetlands in the Lake Bonneville basin. We have classified paleo-river channels of these ages as “gravel channels” and “sand channels.” Gravel channels are straight to curved, digitate, and have abrupt bulbous ends. They are composed of fine gravel and coarse sand, and are topographically inverted (i.e., they stand higher than the surrounding mudflats). Sand channels are younger and sand filled, with well-developed meander-scroll morphology that is truncated by deflated mudflat surfaces. Gravel channels were formed by a river that originated as overflow from the Sevier basin along the Old River Bed during the late regressive phases of Lake Bonneville (after 12,500 and prior to 11,000 14C yr B.P.). Dated samples from sand channels and associated fluvial overbank and wetland deposits range in age from 11,000 to 8800 14C yr B.P., and are probably related to continued Sevier-basin overflow and to groundwater discharge. Paleoarchaic foragers occupied numerous sites on gravel-channel landforms and adjacent to sand channels in the extensive early Holocene wetland habitats. Reworking of tools and limited toolstone diversity is consistent with theoretical models suggesting Paleoarchaic foragers in the Old River Bed delta were less mobile than elsewhere in the Great Basin.

Ediacaran fossils from the southwestern Great Basin, United States

2000 ◽  
Vol 74 (2) ◽  
pp. 349-359 ◽  
Author(s):  
James W. Hagadorn ◽  
Ben Waggoner
Keyword(s):  
United States ◽  
Great Basin ◽  
Southern Africa ◽  
Lower Cambrian ◽  
Trace Fossils ◽  
Death Valley ◽  
Lower Member ◽  
Upper Third

Ediacaran fossils from the southwestern Great Basin may help constrain regional Vendian-Cambrian biostratigraphy and provide biogeographic links between facies in this region and elsewhere. Locally, trace fossils suggest the Vendian-Cambrian boundary occurs within or below the upper third of the lower member of the Wood Canyon Formation. Ediacaran soft-bodied and tubular fossils, including the frondlike fossil Swartpuntia and tubular, mineralized or agglutinated fossils similar to Archaeichnium Cloudina Corumbella, and Onuphionella occur in the lowermost Wood Canyon Formation. Discoidal forms referred to Nimbia occur in both the lowermost Wood Canyon Formation and the underlying strata of the Stirling Quartzite. These fossils occur directly below Lower Cambrian trace fossils, including Treptichnus pedum, and confirm the persistence of the Ediacaran biota to near the base of the Cambrian. These faunas may also help strengthen previously proposed correlation schemes between the two main facies belts of the southwestern Great Basin (the Death Valley and White-Inyo facies), because a nearly identical Vendian-lowest Cambrian succession of faunas occurs in both regions. Lastly, lack of cosmopolitan Ediacaran faunas in these strata suggests a paleobiogeographic link between the southwestern U.S. and southern Africa in Vendian time.

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