Journal ArticleDOI
Diagenetic origin of graywacke matrix minerals
TLDR
In this paper, electron micrographs show that the new minerals have formed as a mesh-like coating on original grains and the textural relationship of the new materials to the original minerals resembles graywacke texture.Abstract:
Summary
Phyllosilicates and zeolites grew in Columbia River sediments during hydrothermal experiments at relatively low temperatures and pressures. Although the new minerals may not be equilibrium assemblages, our results strongly support the idea that matrix minerals in graywackes may be the result of alteration of components thermodynamically unstable in the environment of diagenesis. Scanning electron micrographs show that the new minerals have formed as a mesh-like coating on original grains. The textural relationship of the new minerals to the original minerals resembles graywacke texture.read more
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Book ChapterDOI
Sandstone Diagenesis: The Evolution of Sand to Stone
TL;DR: The classic transition from diagenesis to metamorphism was described eloquently in the Salton Sea geothermal field, south-east California, where sandstones of broadly similar composition are present over a temperature interval of 100°C to 350°C.
Journal ArticleDOI
Petrographic classification of sand and sandstone
TL;DR: In this article, a descriptive petrographic classification of sand and sandstone is proposed based on the quasi-universally used Gazzi-Dickinson pointcounting method, and simply translates into words ternary compositions of quartz, feldspar, and lithic fragments without introducing any new names.
Journal ArticleDOI
The maturity myth in Sedimentology and provenance analysis
TL;DR: In this paper, it was shown that the degree of winnowing, sorting, and rounding has little to do with the accumulation of "modifying energy" through time, and that mineralogical maturity does not increase notably even after thousands of kilometers of transport in high-energy environments, and not even during recycling.
Journal ArticleDOI
Pressure solution as a metamorphic process in deformed terrigenous sedimentary rocks
TL;DR: The most widespread record that terrigenous sedimentary rocks have deformed by a pressure solution mechanism is seen in the development of spaced cleavages and transposition structures under conditions of low grade metamorphism as discussed by the authors.
Book ChapterDOI
Archaean Sedimentary Rocks and Their Relation to the Composition of the Archaean Continental Crust
S. M. McLennan,S. R. Taylor +1 more
TL;DR: In this article, the authors examined tectonic, sedimentological and trace element evidence and concluded that although caution is warranted, information about the nature of the Archaean upper crust can be obtained from the sedimentary data Systematic variations of trace element patterns in Archaean sedimentary rocks provide persuasive evidence for a dominant origin from the common Archaean bimodal mafic-felsic igneous suite.
References
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Journal ArticleDOI
Rises, trenches, great faults, and crustal blocks
TL;DR: In this article, the transform fault concept is extended to a spherical surface, where the motion of one block relative to another block may then be described by a rotation of a rigid crustal blocks relative to the other block.
Journal ArticleDOI
Formation of Red Beds in Modern and Ancient Deserts
TL;DR: In this article, the authors used field, petro-graphic, and chemical data collected from studies of two stratigraphic sequences that contain red beds: (1) Recent, Pleistocene, and Pliocene deposits in the Sonoran desert of northeastern Baja California, Mexico, and (2) late Paleozoic deposits in Colorado.
Journal ArticleDOI
Chemical aspects of hydrothermal alteration with emphasis on hydrogen metasomatism
J. J. Hemley,W. R. Jones +1 more
TL;DR: The ratio of cation to hydrogen-ion concentration is used as a basis for coordinating many observed varieties of silicate rock alteration as discussed by the authors, such as feldspar through sericite, montmorillonite, or paragonite, toward pyrophyllite.
Journal ArticleDOI
Dynamics of Subaqueous Gravity Depositional Processes
TL;DR: In this article, two fundamental dynamic boundaries distinguish elastic, plastic, and fluid behaviors in sedimentary sediments: plastic flow occurs when the yield limit of cohesive sediment is exceeded; original stratification is preserved but contorted; decreasing cohesion and churning destroy stratification and a suspension forms.