Friday, 18 April 2014

WARCHA SANDSTONE:

Type locality: western salt rang zaluch nala 
Lithology: it is mostly composed of sandstone and some where the cabonishous shale .the sandstone is in res color.
The warch formation and the tubra formation are repeted again and again according to the structure geologist that is because of isocline folding.
I observe different geological feature in this formation.
• Mercnish color sandstone
• Ripple marks
• Mold and cost
• White and sandstone
• Bedding of shale which is carbonaceous shale which cantina and produce coal.
• Having iron concretion
• Having pinching out layers
• Upper surface have is spheridicale weathering.
• Root cost (biogenic sedimentary structure)
• Rain pet (missiven sedimentary structure )
• Cross bedding (top set, bottom set, clinoform )
• Grady sand(partical size more then sand)
• Tempestite ..stream deposit

Fossil: having no fossil because it is fluvial deposit .
Age: early Permian
Environment: fluvial
Contact: it’s lower contact with the tubra formation and upper with the sardi formation and it is the diagnostic feature of the wacha sandstone that it’s contact will be with tubra formation and upper with sardi formation if it is not with that then it will be khewra sandstone

Tempestite:
Tempestites are rocks which show evidence of a strong storm, which has redeposited pre-existing sediments. They occur in shallow-water conditions, because these sediments are disturbed and redeposited by the energy of waves. The scientific study of tempestites is called paleotempestology.


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