oa Madoqua - Fluvio-marine deposits south-east of Swakopmund, South West Africa
|Article Title||Fluvio-marine deposits south-east of Swakopmund, South West Africa|
|© Publisher:||Namibian Ministry of Environment and Tourism|
|Affiliations||1 *Geological Survey, Windhoek, South West Africa. **Desert Ecological Research Unit, WaIvis Bay, South West Africa|
|Publication Date||Jan 1976|
|Pages||23 - 26|
|Keyword(s)||Barnacle fragments, Clayey lapers, Crustacean, Damara group, Evaporation, Fish vertebrae, Fossiliferous material, Gastroped specimens, Halite, Heavy minerals, Histogram, Karoo sequence, LithologicaI characteristics, Precipitation of gypsum, Rock types and Sand layers|
Up to two conglomerate layers carrying specimens of Striostrea margaritacea are interbedded in a layered deposit of unconsolidated and gypsum-cemented sand which occurs up to 50 m above sea-level. Size distribution analysis of the sand and surface characteristics of the sand grains indicate sheet- flood action and rapid buriaI, but aeolian and marine reworking is evident and mixing of fluviatile, aeolian and marine sand populations occurred in a fluviomarine environment. The Iittoral fauna suggests freely circulating sea water during periods of limited detrital supply.
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