Open Access Articles- Top Results for Stratum
International Journal of Research and Development in Pharmacy & Life SciencesTHE NEW ADVANCEMENT NANOTECHNOLOGY: PRONIOSOMES AS A PROMISING AND POTENTIAL DRUG CARRIER
International Journal of Innovative Research in Science, Engineering and TechnologyA Survey of Applications of Laser in Dermatology Ã¢ÂÂ Medical Physics
Virology & MycologyFacing the Increasingly Looming Challenges from Environmental Fungal (Molds and Yeast) Contamination
Journal of Biodiversity, Bioprospecting and DevelopmentZebra Mussel Byssus Discs Detaching from Biofilm Coated Substratum
International Journal of Plant, Animal and Environmental SciencesVEGETAL DIVERSITY AND STRUCTURE OF ONE STRATUM IN THREE SITES OF YINGUI´S FOREST MANAGEMENT UNIT (CAMEROON-CENTRAL AFRICA): A COMPARATIVE STUDY
|This article does not cite any references or sources. (December 2010)|
In geology and related fields, a stratum (plural: strata) is a layer of sedimentary rock or soil with internally consistent characteristics that distinguish it from other layers. The "stratum" is the fundamental unit in a stratigraphic column and forms the basis of the study of stratigraphy.
Each layer is generally one of a number of parallel layers that lie one upon another, laid down by natural processes. They may extend over hundreds of thousands of square kilometers of the Earth's surface. Strata are typically seen as bands of different colored or differently structured material exposed in cliffs, road cuts, quarries, and river banks. Individual bands may vary in thickness from a few millimeters to a kilometer or more. Each band represents a specific mode of deposition: river silt, beach sand, coal swamp, sand dune, lava bed, etc.
Geologists study rock strata and categorize them by the material of beds. Each distinct layer is typically assigned to the name of sheet, usually based on a town, river, mountain, or region where the formation is exposed and available for study. For example, the Burgess Shale is a thick exposure of dark, occasionally fossiliferous, shale exposed high in the Canadian Rockies near Burgess Pass. Slight distinctions in material in a formation may be described as "members" (or sometimes "beds"). Formations are collected into "groups" while groups may be collected into "supergroups".
- Archaeological horizon
- Geologic formation
- Geologic map
- Geologic unit
- Law of superposition
- Bed (geology)
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