Annals of the South African Museum, Volume 101, Issue 2 |
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Page 12
These weathered - out burrows seldom exceed 4 cm in diameter and penetrate
little more than 12 cm into the substrate . In a few examples relict mammilation of
the linings can be discerned ( Shone 1983 : 241-242 ) . No clearly defined ...
These weathered - out burrows seldom exceed 4 cm in diameter and penetrate
little more than 12 cm into the substrate . In a few examples relict mammilation of
the linings can be discerned ( Shone 1983 : 241-242 ) . No clearly defined ...
Page 21
Note that the burrow fill is almost indistinguishable from the substrate ; the burrow
margins are revealed only by the effects of differential weathering . mind ,
however , that ichnofacies models are likely to be less reliable in dealing with
ancient ...
Note that the burrow fill is almost indistinguishable from the substrate ; the burrow
margins are revealed only by the effects of differential weathering . mind ,
however , that ichnofacies models are likely to be less reliable in dealing with
ancient ...
Page 23
Increasingly anoxic conditions in such quiet reaches of an epeiric sea would
eventually prohibit colonization by sediment dwellers and eliminate the
possibility of soft - substrate burrowing . Association 3 appears to have
developed in an ...
Increasingly anoxic conditions in such quiet reaches of an epeiric sea would
eventually prohibit colonization by sediment dwellers and eliminate the
possibility of soft - substrate burrowing . Association 3 appears to have
developed in an ...
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Common terms and phrases
abbreviated animals anoxic appear areas author's name authors base bedding surface bioturbated branching burrows Cape capital Chondrites circulation cm Fig colonization contain correlation Cruziana Cruziana ichnofacies model dark pyritic deposited depositional environment described Description designated diameter Diplocraterion energy environment epeiric sea example facies Fascifodina Figure follow formed Frey & Pemberton Häntzschel 1975 horizontal hypersaline conditions illustrations indicate individual Interpretation interval italics known letters lining marking MUD AND SAND mudrock Note occur Ophiomorpha organisms origin parentheses Pemberton 1984 Photograph Planolites possible probably punctuation pyritic range reduction references represent resemble response restricted rocks rounded SAND sand-filled tubes sandstone Sardinia Bay Formation sediment sediment-dwelling sedimentary structures separates shafts Shone showing similar Skolithos Skolithos ichnofacies Smith SOUTH AFRICAN MUSEUM species Spreiten strata substrate suggest Table Table Mountain Group Thalassinoides tidal currents trace fossil association typical U-tube units Upper vermiform vertical wave weathering
Bibliographic information
| Title | Annals of the South African Museum, Volume 101, Issue 2 Annals of the South African Museum, South African Museum |
| Author | South African Museum |
| Publisher | West, Newman & Company for the trustees of the Museum, 1991 |
| Original from | the University of California |
| Digitized | 20 Jul 2016 |
| ISBN | 0868131229, 9780868131221 |
| Export Citation | BiBTeX EndNote RefMan |