sedimentary structure

sedimentary structure

[¦sed·ə¦men·trē ′strək·chər]
(geology)
A structure in sedimentary rocks, such as cross-bedding, ripple marks, and sandstone dikes, produced either contemporaneously with deposition (primary sedimentary structures) or shortly after deposition (secondary sedimentary structures).
References in periodicals archive ?
Sedimentary structure and early diagenetic features of shallow marine carbonate deposits: SEPM Atlas Series no.
Cross bedding is a common sedimentary structure in many depositional environments, being largely defined by internal grain size variations and sorting from fine sand to granules.
She further states that there is a possibility that the sedimentary structure on Mars may not have biological origin.
Sedimentary structure such as horizontal bedding and ripple bedding is also well developed.
Shinn (1983) noted that no single sedimentary structure is more indicative of the upper intertidal and the supratidal depositional environment than mudcracks caused by shrinkage of carbonate mud.
Some cores showed the presence of sedimentary structure, which included cross bedding, cross lamination, and parallel laminations.
Flaser bedding is the dominant sedimentary structure in the sandstones beds; asymmetrical ripples are abundant and burrows are moderately common, indicating a marine environment with rapidly changing current speeds.
Paleoecology of main biota (calcispheres, planktons and filaments) and microscopic sedimentary structure recorded in microfacies reveal that Kawagarh Formation was deposited over mid and outer ramp settings as deepening upward sequence.
Stromatolites and microbially induced sedimentary structures (miss) are considered as one of the earliest evidence of life in earths history, And can be found from the archean to the present time.
Explaining the test site, Dr Gromer said: "Dhofar replicates various Mars surface features, such as sedimentary structures dating back to the Paleocene and Eocene, salt domes of the South Oman Salt Basin and ancient riverbeds.
Designed for students and amateur geologists, it covers all of the basic ideas of sedimentology including the different types of sedimentary rocks, sedimentary structures and environments, the search for hydrocarbons, and why sedimentary rocks are a valuable economic resource.
Sedimentologists apply their understanding of modern processes to interpret geologic history through observations of sedimentary rocks and sedimentary structures.