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Details van artikel 3 van 12 gevonden artikelen
| Titel: |
A metamorphosed coral in an olivine-bearing hornfels from New South Wales |
| Auteur: |
Wright, A. J. Ghent, E. D. |
| Verschenen in: |
Australian journal of earth sciences |
| Paginering: | Jaargang 20 (1973) nr. 1 pagina's 79-84 |
| Jaar: |
1973 |
| Inhoud: |
A halysitid coral specimen, doubtfully referred to Quepora, was found in a forsterite-phlogopite marble from near Walang, east of Bathurst. The rocks are probably of hornblende hornfels facies. Some recent reports of fossils in metamorphic rocks are noted. Alteration of the coral is compared with that seen in less metamorphosed halysitids from elsewhere. Halysitid corals appear to recrystallize in two stages. First, intertabular and lacunar sparite recrystallize, the former sometimes first developing into 'saw-teeth' (a previously undescribed type of structure); during this phase, walls lose their internal structure. Secondly, tabulae and walls are altered to finely and then coarsely granular calcite. Under certain conditions tabulae are incorporated into recrystallized matrix before the walls. |
| Uitgever: |
Taylor & Francis |
| Bronbestand: |
Elektronische Wetenschappelijke Tijdschriften |
Details van artikel 3 van 12 gevonden artikelen
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