Results 311 to 320 of about 871,982 (402)

OBSERVATIONS OF COARSE-GRAINED FLUVIODELTAIC ROCKS IN THE JEZERO WESTERN FAN AND GALE CRATER: IMPLICATIONS FOR SEDIMENTARY ROCK FORMATION AND MARS SAMPLE

open access: bronze
K. L. Siebach   +8 more
openalex   +1 more source

Nature of the sedimentary rock record and its implications for Earth system evolution.

Emerging Topics in Life Sciences, 2018
The sedimentary rock reservoir both records and influences changes in Earth's surface environment. Geoscientists extract data from the rock record to constrain long-term environmental, climatic and biological evolution, with the understanding that ...
J. Husson, S. Peters
semanticscholar   +1 more source

Sedimentary Rocks

2014
Sediments and sedimentary rocks form under natural process of physical, chemical and biological weathering of igneous, metamorphic and old sedimentary rocks. The mechanisms involve transpiration, deposition, compaction, lithification and/or diagnosis.
S.K. Haldar, Josip Tišljar
openaire   +2 more sources

Evolution of Sedimentary Rocks

2003
For almost a century, it has been recognized that the present-day thickness and areal extent of Phanerozoic sedimentary strata increase progressively with decreasing geologic age. This pattern has been interpreted either as reflecting an increase in the rate of sedimentation toward the present or as resulting from better preservation of the younger ...
J. Veizer, F.T. Mackenzie
openaire   +2 more sources

The Organization of Sedimentary Rocks

SEPM Journal of Sedimentary Research, 1950
Attempted practical applications of existing classifications of sedimentary rocks commonly encounter difficulties and inconsistencies: (1) sediments normally unassociated during deposition are artificially grouped together; (2) inferences about environment, degree of tectonic influence, and other factors not everywhere legible in the rocks are required
Edward Charles Dapples   +2 more
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Zeolites in Sedimentary Rocks [PDF]

open access: possibleSEPM Journal of Sedimentary Research, 1959
ABSTRACT Zeolite minerals, especially analcime and clinoptilolite, are known to occur widely in sedimentary rocks both as nearly monomineralic beds and as accessory minerals. Because of the extremely fine grain size of the zeolite rocks, identifications are made most readily with X-ray diffraction techniques.
openaire   +1 more source

A Classification of Sedimentary Rocks

The Journal of Geology, 1948
A simple field and laboratory classification of sedimentary rocks is proposed. It is based fundamentally on composition and texture, with the primary divisions determined by the mode of origin of the constituents. Tt is tripartite in nature, consisting of (1) a dominantly fragmental division, including conglomerates, sandstones, and shales; (2) a ...
openaire   +2 more sources

The effects of redox conditions on arsenic re-release from excavated marine sedimentary rock with naturally suppressed arsenic release

Environmental Geochemistry and Health, 2022
Akihide Kamata   +4 more
semanticscholar   +1 more source

Sedimentary Rock

Encyclopedic Dictionary of Archaeology, 2021

semanticscholar   +1 more source

Sedimentary Rocks and the Oceans

1972
Interest in the isotopic composition of strontium in sedimentary rocks is increasing rapidly. Recent work includes dating of argillaceous sedimentary rocks as well as studies of the variation of the 87Sr/86Sr ratios of the oceans in the geologic past. While much progress has been made, many challenging problems remain to be solved.
James L. Powell, Gunter Faure
openaire   +2 more sources

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