redbed

redbed

[′red‚bed]
(geology)
Continentally deposited sediment composed principally of sandstone, siltsone, and shale; red in color due to the presence of ferric oxide (hematite). Also known as red rock.
References in periodicals archive ?
They were buried before well differentiated horizons could form and appear broadly similar to the immature redbed paleosols described from the Joggins and Springhill Mines formations (Davies et al.
Purple soils, taxonomically designated as Eutric Regosol according to FAO soil classification, are developed from sedimentary redbed rocks of various geologic epochs.
They consist of strongly dissected caliche breaks and redbed breaks" (Anonymous 1977a).
4) consists of a Late Devonian redbed and volcanic sequence referred to as the Fountain Lake Group, Late Devonian to Mississippian clastic fluvial-lacustrine rocks of the Horton Group, Mississippian marine evaporite, clastic-carbonate sequence of the Windsor Group, the fine-grained terrestrial clastic rocks of the Mabou Group, coal measures of the Cumberland Group, and late Carboniferous to Permian redbeds of the Pictou Group (Ryan et al.
The occurrence of such a concentrated footprint record within a reduced redbed horizon is suggestive of the presence of organic material, but whether organic matter in the presence of the trackmakers bears any paleoecological significance is uncertain.
All post-Acadian redbed exposures are located in the Waite zone, including two new fault-bounded slivers discovered during this study.
The following deductions can be made concerning the red clay in core 94138-104: 1) the coloration suggests a Carboniferous redbed source, the most proximal being the Deer Lake Basin; 2) foraminifera analysis indicates reduced salinity; 3) the position of the red unit at the top of the glaciomarine sequence shows that it was deposited immediately following deglaciation but before the deposition of Unit 3; and 4) the lack of clasts (dropstones) suggests a non-glacial source.
postrobusta Biozone has not been established above the redbeds in the southernmost East Baltic cores (Kolka, Ventspils, Pavilosta, Gussev-1).
Fluoride levels in groundwater influenced by associated evaporites and redbeds are also elevated in this area, and have a mean concentration of 1.
Late Mississippian rocks in this region consist of marine carbonates, shales, evaporites, eolianites, continental redbeds, and certain characteristic paleosols (for example, calcareous aridisols and vertisols), which show that this portion of the Appalachian foreland basin was located in the arid subtropics (Cecil 1990; Cecil and others 1997; Miller and Eriksson 1999).
However, quartz overgrowths do occur in overlying redbeds.
A 16 inch intermediate casing was set into the Rustler Anhydrite above the Salado Salt at 2,350 feet to isolate the Permian Redbeds.