Grammar and dictionary of the Dakota language

Riggs, Stephen Return

doi:10.5962/bhl.title.25370

Cited by 7 publications

(3 citation statements)

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“…-The dolomite one of non phosphatic minerals that obtained in the mineralogical composition and a ccording to many authors (Strakhov, 1962;Friedman and Sanders, 1967;Pettijohn, 1975;Riggs, 1979a; and others) the dolomite can form in shallow evaporate basins within the intertidal zone of carbonate environment and seems to be more related to the deposition of phosphorites.…”

Section: -Origin and Environmental Deposits Of El-rashda El-mawhoob mentioning

confidence: 90%

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Facies and Depositional Environment of the Phosphate Deposits at El-Rashda, El-Mawhoob Area, Dakhla Oasis, Western Desert, Egypt.

Awad

Nadeem

Sameeh

et al. 2013

Al-Azhar Bulletin of Science- Basic Science Sector

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This work which is based on the field and laboratory investigations represents to throw light on the geological, mineralogical, geochemical and environmental deposition of the phosphorite deposits at El-Rashda, El-Mawhoob area, Dakhla, Western Desert, Egypt.fifty stratigraphic sections, 19 borholes representing the study area, are measured, sampled and studied.The laboratory work comprises 69 samples for studying physical properties, 11 samples for XRD analyses, 27 thin sections and 133 samples for chemical analyses using XRF method to detect the major oxides, as well as trace element.The studies revealed that flour apatite, carbonate flourapatite, carbonatehydroxylapat, flourellestadite, ankerite, dolomite, are the main constituents of the studied phosphorite deposits. While the associated minerals are, halite, quartz, anhydrite, montmorillonite, calcite. (table

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Section: -Origin and Environmental Deposits Of El-rashda El-mawhoob mentioning

confidence: 90%

“…In some deposits it is laminated. Halite is detected at only three samples (19), (18), (17), (28) of the X-ray line spectra of the studied samples.…”

Section: Halite (Nacl);mentioning

confidence: 95%