Measured movement along the surface trace of an active thrust fault in the Buena Vista Hills, Kern County, California

1958 ◽  
Vol 48 (2) ◽  
pp. 169-176
Author(s):  
James W. Wilt
Keyword(s):  
Average Rate ◽  
Thrust Fault ◽  
Oil Field ◽  
Ground Movement ◽  
Control Points ◽  
Kern County ◽  
The Past ◽  
Buena Vista

abstract For the past twenty-four years, measurements have been made of continuing movement on an active thrust fault in the Buena Vista Hills oil field in Kern County, California. Data are presented which show the rate and accumulated ground movement normal to the strike of the fault. Maximum accumulated movement between pairs of control points has been 1.637 feet, corresponding to an average rate of 0.068 feet per year.

scholarly journals Hurricanes as a Major Driver of Coastal Erosion in the Mississippi River Delta: A Multi-Decadal Analysis of Shoreline Retreat Rates at Bay Champagne, Louisiana (USA)

Water ◽  
2018 ◽  
Vol 10 (10) ◽  
pp. 1480 ◽  
Author(s):  
Marianne Dietz ◽  
Kam-biu Liu ◽  
Thomas Bianchette
Keyword(s):  
Mississippi River ◽  
Average Rate ◽  
Landsat Imagery ◽  
Mississippi River Delta ◽  
Coastal Lake ◽  
Shoreline Retreat ◽  
The Past ◽  
Coastal Features ◽  
Mexico Coast

The Louisiana shoreline is rapidly retreating as a result of factors such as sea-level rise and land subsidence. The northern Gulf of Mexico coast is also a hotspot for hurricane landfalls, and several major storms have impacted this region in the past few decades. A section of the Louisiana (USA) coast that has one of the highest rates of shoreline retreat in North America is the Caminada-Moreau headland, located south of New Orleans. Bay Champagne is a coastal lake within the headland that provides a unique opportunity to investigate shoreline retreat and the coastal effects of hurricanes. In order to examine the influence of hurricanes on the rate of shoreline retreat, 35 years (1983–2018) of Landsat imagery was analyzed. During that period of time, the shoreline has retreated 292 m. The overall rate of shoreline retreat, prior to a beach re-nourishment project completed in 2014, was over 12 m per year. A period of high hurricane frequency (1998–2013) corresponds to an increased average shoreline retreat rate of >21 m per year. Coastal features created by multiple hurricanes that have impacted this site have persisted for several years. Bay Champagne has lost 48% of its surface area over the last 35 years as a result of long-term shoreline retreat. If shoreline retreat continues at the average rate, it is expected that Bay Champagne will disappear completely within the next 40 years.

scholarly journals Results of Radiocarbon Analysis of Upper Weichselian Loess Sequences from Hungary

Radiocarbon ◽  
2007 ◽  
Vol 49 (2) ◽  
pp. 1023-1030 ◽  
Author(s):  
Pal Sümegi ◽  
Mihály Molnár ◽  
éva Svingor ◽  
Zsuzsanna Szántó ◽  
László Hum ◽  
...  
Keyword(s):  
Average Rate ◽  
Soil Development ◽  
Carpathian Basin ◽  
Sedimentation Rates ◽  
Quaternary Period ◽  
The Past ◽  
Rate Of Sedimentation ◽  
Dust Accumulation

Approximately 10% of Hungary is covered by dust sequences of the Quaternary period. Samples have been taken from more than 50 outcrops and boreholes during fieldwork in the past 20 yr. Some 81 bulk samples taken from 27 profiles of the Hungarian loess regions have been analyzed for radiocarbon. Based on the 14C results, loess layers that accumulated between 33,000 and 12,000 BP were selected for further investigation. The sedimentation rates of the 27 loess profiles suggest periods of slow and quick dust accumulation in the Carpathian Basin during the Upper Weichselian period. It seems to us that some soil development and intense weathering periods interrupted the loess development during the Upper Weichselian in Hungary. According to the 14C dates, the estimated average rate of sedimentation was 0.31 mm/yr in both the northern and southern parts of the Carpathian Basin between 33,000 and 12,000 BP.

Evidence of Acidification of Some Nova Scotian Rivers and Its Impact on Atlantic Salmon, Salmo solar

1983 ◽  
Vol 40 (4) ◽  
pp. 462-473 ◽  
Author(s):  
W. D. Watt ◽  
C. D. Scott ◽  
W. J. White
Keyword(s):  
Atlantic Salmon ◽  
Salmo Salar ◽  
River Discharge ◽  
Average Rate ◽  
Metamorphic Rocks ◽  
Ph Variation ◽  
The Past ◽  
Discharge Rates ◽  
Ph Range ◽  
Nova Scotian

River pH's in Nova Scotia are closely related to geology, and seasonal pH variation is well correlated with river discharge rates. In the geologically sensitive areas (granite and metamorphic rocks), river pH's have fallen significantly over the past 27 yr at an apparent average rate of 0.017 pH units/year. Concomitant with this decrease are a decline in [Formula: see text] concentrations and increases in Al+++ and [Formula: see text]. On average, 73% of the increase in acid is attributable to increased [Formula: see text]. Changes in Na+, K+, Ca++, and Mg++ concentrations were not significant. In rivers presently at mean annual pH's < 4.7, the Atlantic salmon (Salmo salar) runs have disappeared and are presumed extinct. Rivers in the pH range 4.7–5.0 show a decline in salmon angling returns of 2.8%/yr, beginning about 1954, and low densities of juvenile salmon. Rivers presently of pH > 5.0 generally have normal juvenile densities and show no significant trend in angling returns.

FIRST AFRICAN OIL SPILL COOPERATIVE: CLEAN NIGERIA ASSOCIATES

1987 ◽  
Vol 1987 (1) ◽  
pp. 151-156
Author(s):  
Godwin E. Omene ◽  
E. C. Odogwu ◽  
Tom E. Allen
Keyword(s):  
Oil Spills ◽  
Oil Industry ◽  
General Purpose ◽  
Oil Field ◽  
Competitive Bidding ◽  
Oil Companies ◽  
The Past ◽  
Port Harcourt ◽  
Petroleum Companies ◽  
Production Areas

ABSTRACT In November 1981 the petroleum companies operating in Nigeria formed a cooperative with the general purpose of developing an oil industry-sponsored organization for combating oil spills. The organization was named Clean Nigeria Associates (CNA). Individual oil companies operating in Nigeria now have and have had in the past the capability to combat oil spills, but most were unprepared to handle major oil spills. Thus, the main thrust of the cooperative was to develop an equipment stockpile and response capability commensurate with major spill risks. Through competitive bidding, Halliburton Nigeria, Ltd. was selected as the cooperative contractor. Agreements were formally signed in September 1984. Since that time the equipment required by the association was procured by Halliburton and put in place at two locations, Warri and Port Harcourt. These two locations were selected because of their proximity to major production areas. Bases were established at Nigerian Ports Authority facilities which were set aside for oil field operations. Thus, equipment warehouses are in excellent positions to respond to marine spills, and to respond to land spills by road. The equipment stockpile consists of 27,000 ft of booms, 28 skimmers—both for protected waters and offshore, 4,000 bales of sorbents, 26 pumps, 14 boats (ten 15 ft and four 49 ft) and an assortment of vehicles and other support equipment. CNA has a dedicated staff of 38. The staff consists of management, equipment operators, mechanics, boat crews, and support personnel. Since December 1984, training of national personnel on spill response and safety has been a high priority and has continued to this date.

Development of a Correlation Between Performance of CO2 Flooding and the Past Performance of Waterflooding in Weyburn Oil Field

2007 ◽  
Vol 22 (02) ◽  
pp. 260-264 ◽  
Author(s):  
Koorosh Asghari ◽  
Mingzhe Dong ◽  
Jessie Shire ◽  
Tom Jordan Coleridge ◽  
Janelle Nagrampa ◽  
...  
Keyword(s):  
Oil Field ◽  
Co2 Flooding ◽  
Past Performance ◽  
The Past
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