Annals of the South African Museum: Annale Van Die Suid-Afrikaanse MuseumWest, Newman & Company for the trustees of the Museum, 1990 - Natural history |
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Page 216
... trace fossils , in rocks of the lower Witteberg Group in the Willowmore district . Loock ( 1967 ) reported the discovery of a ' Chonetes ' ( brachiopod ) in sandstones in the lower divisions of the Witteberg Group near Robertson ...
... trace fossils , in rocks of the lower Witteberg Group in the Willowmore district . Loock ( 1967 ) reported the discovery of a ' Chonetes ' ( brachiopod ) in sandstones in the lower divisions of the Witteberg Group near Robertson ...
Page 218
... fossils . This in turn , is overlain by the Swartruggens Formation , a relatively thick heterolithic unit comprising siltstone and shale with thin sandstone interbeds , and containing plant fossils and Zoophycos traces . The top of the ...
... fossils . This in turn , is overlain by the Swartruggens Formation , a relatively thick heterolithic unit comprising siltstone and shale with thin sandstone interbeds , and containing plant fossils and Zoophycos traces . The top of the ...
Page 220
... Trace fossils are common throughout the sequence and marine invertebrates were recovered from the topmost cycle . The upward - fining cycles are interpreted as being the products of a tidal - flat environment crossed by meandering tidal ...
... Trace fossils are common throughout the sequence and marine invertebrates were recovered from the topmost cycle . The upward - fining cycles are interpreted as being the products of a tidal - flat environment crossed by meandering tidal ...
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Common terms and phrases
abbreviated AFRICA articulate brachiopods barrier islands benthic assemblages BENTHIC COMMUNITIES bicuspidata Gould bivalves bivalves and possible Blinkberg Formation Bokkeveld Group Boucot British Museum Natural carbonaceous shales Chonetes Chonetid Community comma cross-bedded deeper-water subtidal conditions delta deposited Devonian rocks environmental External mould facies analysis Falkland Islands fauna Formation near Touws Frasnian gastropod genus Givetian Grahamstown high-diversity holotype homalonotid trilobite horizontal lamination Howison's Poort inarticulate infaunal interpreted Leda Lingula lepta LOWER WITTEBERG GROUP Museum Natural History namacolus Orbiculoidea overlain paratypes parentheses pedicle valve punctuation salinity sandstones scientific name sediment SEDIMENTARY FACIES shoreline shouldered italics siltstone and shale Silurian and Devonian SOUTH AFRICAN MUSEUM specimens Spiriferid Community Stratigraphic subheadings are shouldered suspension feeders SWARTRUGGENS FORMATION Synonymy Tankard & Barwis taxa Theron thin tidal tidal-flat Touws River trace fossils Trigonoglossa Tropidoleptus sp Upper Devonian upward-fining cycles Wagen Drift Formation wash-over Weltevrede Formation Western Cape Witpoort Formation yielded marine invertebrate