Results 301 to 310 of about 56,030 (333)

ZEOLITES IN SEDIMENTARY ROCKS, WITH REFERENCE TO THE DEPOSITIONAL ENVIRONMENTS AND ZONAL DISTRIBUTION

Sedimentology, 1966
SUMMARYThe authors have studied alterations of Cenozoic and Mesozoic pyroclastic rocks of Japan, which contain several kinds of zeolites in abundance. This paper summarizes zeolites in sedimentary rocks, with reference to the depositional environments and zonal distribution, by a survey of the literature in addition to the authors’ data.The zonal ...
Minoru Utada, Azuma Iijima
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Bedded Barite Deposits in Sedimentary Environment: ABSTRACT

AAPG Bulletin, 1972
Bedded deposits of barite are supplying an increasingly large part of the world's barite production, which is now nearly 4 million tons annually. A fourfold increase in the past 25 years is due chiefly to its use in drilling mud. Bedded deposits will continue to increase in commercial importance because many contain millions of tons of high-grade ...
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Ten placer deposit models from five sedimentary environments

Applied Earth Science, 2012
Placers deposits are now known from five sedimentary environments; washout, river, aeolian, beach, and continental shelf. In each environment, the concentration of mineral grains, or sorting, takes place either by removal of gangue grains (denudation) or by addition of valuable grains (accumulation).
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SEDIMENTARY ENVIRONMENT AND EROSION-DEPOSITIONAL PATTERN OF THE OUTER CHANNEL OF LIANYUNGANG PORT

Marine Geology & Quaternary Geology, 2013
The sand supply to Jiangsu coast was cut off after Yellow River shifted to north into the Bohai Bay in 1885,and then the outer channel of Lianyungang turned to an erosional environment.This paper is devoted to the evolution of erosion-deposition pattern of the area based on studies of changes in environment,topography,wave,coastal current,sand input ...
GU Guochuan, Lin Zhang, Shenliang Chen
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Depositional Environments as Interpreted from Primary Sedimentary and Stratigraphic Sequences

1975
The focus of these notes is on the use of primary sedimentary structures and stratification sequence as tools for interpretation of depositional environment of clastic sediments, emphasizing advances in understanding that the authors judge to be important. To accomplish the primary objective, several topics have been selected.
D. R. Spearing, J. C. Harms, R. G. Walker, John B. Southard   +3 more
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Depositional sedimentary environments

Marine Geology, 1975
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The Saint Clair River Delta; sedimentary characteristics and depositional environments

Journal of Sedimentary Research, 1973
ABSTRACT Progradation of the northeastern shoreline of Lake St. Clair by the St. Clair River has created a modern, freshwater delta with a birdfoot configuration similar to that of the Mississippi deltaic plain. Textural parameters based on moment measures for surface sediments collected at 231 stations located on 78 square miles of the exposed and ...
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Turbidite sedimentary structures and their relationship to proximal and distal depositional environments

Journal of Sedimentary Research, 1967
ABSTRACT The sand fraction of turbidites can be divided into three parts: from base upward the graded division (A), lower laminated division (B) and current rippled division (C). Some divisions may be missing in individual beds, which can thus start with either division A, B, or C.
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Sedimentary Reflection of Depositional Environment in the Bardawil Lagoon, Northern Sinai

SEPM Journal of Sedimentary Research, 1974
ABSTRACT Bardawil lagoon is a body of water about 600 km2, it is about 80 km long and its maximal width is approximately 18 km. The lagoon is separated from the Mediterranean by a sand barrier. Waters and sediments of the lagoon were analysed. The decrease in specific alkalinity of the waters with increasing distance from the inlets and with increasing
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Depositional sedimentary environments [book review] [PDF]

American Journal of Science, 1975
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