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Titolo:
THE SEDIMENTOLOGY OF THE NEOPROTEROZOIC GRAMPIAN GROUP AND THE SIGNIFICANCE OF THE FORT-WILLIAM SLIDE BETWEEN SPEAN BRIDGE AND RUBHA CUIL-CHEANNA, INVERNESS-SHIRE
Autore:
GLOVER BW;
Indirizzi:
BRITISH GEOL SURVEY,KINGSLEY DUNHAM CTR KEYWORTH NG12 5GG NOTTS ENGLAND
Titolo Testata:
Scottish journal of geology
, volume: 29, anno: 1993,
parte:, 1
pagine: 29 - 43
SICI:
0036-9276(1993)29:<29:TSOTNG>2.0.ZU;2-M
Fonte:
ISI
Lingua:
ENG
Soggetto:
PROTEROZOIC CLASTIC SEQUENCE; CENTRAL HIGHLANDS; DALRADIAN SLIDES; SCOTLAND;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
55
Recensione:
Indirizzi per estratti:
Citazione:
B.W. Glover, "THE SEDIMENTOLOGY OF THE NEOPROTEROZOIC GRAMPIAN GROUP AND THE SIGNIFICANCE OF THE FORT-WILLIAM SLIDE BETWEEN SPEAN BRIDGE AND RUBHA CUIL-CHEANNA, INVERNESS-SHIRE", Scottish journal of geology, 29, 1993, pp. 29-43

Abstract

The Neoproterozoic metasedimentary rocks between Spean Bridge and Rubha Cuil-cheanna in the Central Highlands of Scotland form part of the Grampian and Appin Groups of the Caledonides. The oldest strata, the Fort William Formation comprise an outer shelf, storm-dominated, muddy (semi-pelitic) sequence, with minor shallowing events represented by thinner arkosic (psammitic) intercalations. Infrequent dropstone deposits are interpreted as evidence of glacial influences. The transition into the overlying Inverlair Formation records a basin shoaling event which resulted in coastal (?estuarine) sedimentation. Deposition of theoverlying Spean Viaduct Quartzite (Appin Group) reflects slower subsidence rates and greater (tidal?) sediment reworking. The 'Fort WilliamSlide', previously interpreted as tectonic in origin, is here regarded as a localised intra-Appin Group unconformity. This cuts out much ofthe Grampian Group and the Lochaber Subgroup towards Rubha Cuil-cheanna and represents the culmination of basin shoaling initiated during Grampian Group times. There was no significant tectonic movement along the unconformity due to its unsuitable orientation. Above the unconformity Ballachulish Subgroup strata on-lap towards the south. To the east of the area (e.g. Glen Spean) continuous sedimentation may have occurred throughout Appin Group times.

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Documento generato il 14/07/20 alle ore 12:26:34