| Noonday Dolomite | |
|---|---|
| Stratigraphic range: [1] | |
| Type | Geological Formation |
| Sub-units | "Algal Dolomite" and "Sandy Dolomite" Members |
| Underlies | Johnnie Formation |
| Overlies | (Unconformably) Pahrump Group |
| Thickness | 0–1,500 ft (0–457 m) [1] |
| Lithology | |
| Primary | Dolomite |
| Other | Limestone, Shale, Graywacke |
| Location | |
| Region | California |
| Country | United States |
The Wyman Formation is an Ediacaran aged geologic formation in California, primarily within the Death Valley, Kingston Range and the Panamint Range. [1]
The Wyman Formation is composed of two members, the Lower Algal Dolomite member, and the Upper Sandy Dolomite Member. [1] Within the eastern area of the Death Valley, there is a wedge of clastic material between these two members, consisting of lavender shale and graywacke, and further thickness going southwest. In the central and northern parts of the Panamint Range, another unit can be found in between the Lower and Upper members, composed of laminated silty and sandy limestones, and was formally known as the Radcliff Formation. [1]
This member consists of light-coloured dolomite rocks, and possibly contains the trace fossil Skolithos (Spelled in its older spelling of Scolithus), although it has been noted these may simply be algal in origin. It was formally known as the Sentinel Dolomite, before the Noonday Dolomite was extended. [1]
This member is composed of clastic dolomite, which is commonly cross-stratified. There are also detrital quartz grains found throughout the member. It was a part of the lower section of the now formally named Redlands Dolomitic Limestone, before the Noonday Dolomite was extended. [1]
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