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CAVERN BRECCIA [1 record]
Record 1 - internal organization data 2011-12-12
Record 1, English
Record 1, Subject field(s)
- Erosion and Weathering (Geol.)
- Geochemistry
Record 1, Main entry term, English
- early dolomitization
1, record 1, English, early%20dolomitization
correct
Record 1, Abbreviations, English
Record 1, Synonyms, English
- early dolomitisation 2, record 1, English, early%20dolomitisation
correct, Great Britain
Record 1, Textual support, English
Record number: 1, Textual support number: 1 CONT
… the breccia is more likely an intraplatformal cavern collapse feature associated with early dolomitization because : 1) the clasts are surrounded with saddle dolomite and sulfide minerals, not basinal sediments as expected if the clasts were exposed on the seafloor following margin collapse; 2) the megabreccia includes varied dolostone clasts(some fabric-preserving, some not) but lacks clasts of abutting basinal rocks and so cannot be interpreted as a post-Middle Cambrian subsurface diagenetic feature; 3) despite the size of the contained clasts, the megabreccia shows a restricted lateral distribution, not the apron-like geometry of a debris flow deposit; and 4) the megabreccia is directly overlain by non-dolomitized basinal limestone. 3, record 1, English, - early%20dolomitization
Record 1, French
Record 1, Domaine(s)
- Érosion et corrosion (Géologie)
- Géochimie
Record 1, Main entry term, French
- dolomitisation précoce
1, record 1, French, dolomitisation%20pr%C3%A9coce
correct, feminine noun
Record 1, Abbreviations, French
Record 1, Synonyms, French
Record 1, Textual support, French
Record number: 1, Textual support number: 1 CONT
Deux types de dolomitisation existent, la dolomitisation précoce et la dolomitisation tardive. La dolomitisation précoce se fait lors de la diagenèse du sédiment et s’effectue le plus souvent dans des mers chaudes à salinité élevée. La calcite se fait remplacer par la dolomite et celle-ci s’observe en lame mince par de fins rhomboèdres typiques. On la remarque également, car la dolomite laisse apparaître des fantômes de structures originelles, comme des grains oolithiques ou même des fragments de coquilles. 2, record 1, French, - dolomitisation%20pr%C3%A9coce
Record 1, Spanish
Record 1, Textual support, Spanish
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