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Capturing Key Attributes of Fine-Grained Sedimentary Rocks In Outcrops, Cores, and Thin Sections: Nomenclature and Description Guidelines
Abstract An integrated nomenclature scheme is proposed to capture the inherent heterogeneity of fine-grained sedimentary rocks at the 102 to 10−3 mm scale and to assist the evaluation of these rocks
Microbial mats in terrigenous clastics; the challenge of identification in the rock record
Increasingly, microbial communities are recognized for playing a potentially important role in defining and modifying surface sediment characteristics in various settings, ranging from terrestrial,
Deposition, exhumation, and paleoclimate of an ancient lake deposit, Gale crater, Mars
The observations suggest that individual lakes were stable on the ancient surface of Mars for 100 to 10,000 years, a minimum duration when each lake was stable both thermally (as liquid water) and in terms of mass balance (with inputs effectively matching evaporation and loss of water to colder regions).
Accretion of Mudstone Beds from Migrating Floccule Ripples
Using flume experiments, it is found that the bedload transport and deposition of clay floccules occurs at flow velocities that transport and deposit sand, which suggests an underlying universal process.
Common Themes in the Formation and Preservation of Intrinsic Porosity in Shales and Mudstones - Illustrated with Examples Across the Phanerozoic
In shales, intrinsic porosity is considered a direct outcome of those processes that are active during deposition and early compaction of a shale succession. They are typically in the micrometer to
A Habitable Fluvio-Lacustrine Environment at Yellowknife Bay, Gale Crater, Mars
The Curiosity rover discovered fine-grained sedimentary rocks, which are inferred to represent an ancient lake and preserve evidence of an environment that would have been suited to support a martian
Atlas of microbial mat features preserved within the siliciclastic rock record
Drawing on a combination of modern occurrences and likely ancient counterparts, this atlas is a treatise of mat-related sedimentary features that one may expect to see in ancient terrigenous clastic
Mud re-distribution in epicontinental basins – Exploring likely processes
Abstract Fine grained clastic sediments are very common in the interior deposits of ancient epicontinental seas. Not only do they make up the gross lithology in these basins, but they can also be
Mudstone Primer: Lithofacies variations, diagnostic criteria, and sedimentologic–stratigraphic implications at lamina to bedset scale
More than two-thirds of the sedimentary record is composed of rocks dominated by grains smaller than 62.5 micrometers. These fine-grained sedimentary rocks serve as sources, reservoirs, and seals of
In modern environments where environmental parameters, such as low oxygen conditions or high salinity, restrict metazoan grazing, microbial mats tend to prosper. Examples are the Beggiatoa mats in