The Roadside Geology of Namibia |
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Page 78
... layers of calcrete . This calcrete was formed by evaporation of near - surface groundwater , which contained calcium ... layer of magnetic , dark - brown iron shale composed largely of limonite , with minor magnetite and trevorite ...
... layers of calcrete . This calcrete was formed by evaporation of near - surface groundwater , which contained calcium ... layer of magnetic , dark - brown iron shale composed largely of limonite , with minor magnetite and trevorite ...
Page 115
... layers according to the progressive cooling from the inside to the out- side . Erosion later removed layer by layer , leaving the typical rounded granite boulders . This type of weathering is termed " onion - skin weather- ing " and ...
... layers according to the progressive cooling from the inside to the out- side . Erosion later removed layer by layer , leaving the typical rounded granite boulders . This type of weathering is termed " onion - skin weather- ing " and ...
Page 171
... layers of purplish limestone , although minor rhyolitic tuffite , pyroclastic rock and amygdaloidal basalt occur near the base . The colour of the quartzite layers varies from purplish to grayish red , depending on the feldspar content ...
... layers of purplish limestone , although minor rhyolitic tuffite , pyroclastic rock and amygdaloidal basalt occur near the base . The colour of the quartzite layers varies from purplish to grayish red , depending on the feldspar content ...
Contents
Namibia from the Archaean to the Cenozoic | 9 |
An overview of the Namibian mineralogy | 23 |
Present mineral production and exploration | 29 |
Copyright | |
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Common terms and phrases
amphibolites basalts Belt Brandberg Brukkaros calcrete Cenozoic Cenozoic sediments column for route composed conglomerate Craton Cretaceous crossed Damara Granite Damara Orogen Damara Sequence deposits diamond dolerite dolomite dunes Dwyka Formation dykes Erongo Escarpment Etendeka Etjo Fault Fish River Subgroup fossils Geological gneisses Grootfontein Hakos Group Henties Bay hills Hohewarte Complex Huab intruded Kalahari Basin Kalahari Group Karibib Karoo Sequence Keetmanshoop Kuibis Subgroup Kuiseb Formation Kunene landscape layers limestone Lüderitz Maltahöhe marble Mesoproterozoic metamorphic meteorite minerals Mulden Group Namaqualand Namaqualand Complex Namib Desert Namibia Nappe Naukluft northern Nosib Group occur Okahandja Omaruru Orange River Otavi Otavi Group Otjiwarongo outcrops Outjo overlain overlying PALAEOPROTEROZOIC pegmatites peneplain prominent quartz latite quartzite ridge road continues road cuts rocks sand sandstone schist Schwarzrand Subgroup seen Sesfontein shale sills Sinclair Sequence Spitzkuppe Swakop Group Swakopmund terrane underlain thrust Tsondab Tsumeb Tsumeb Subgroup turn-off Ugab underlain by Cenozoic valley volcanic Windhoek Zone