Catalogo Articoli (Spogli Riviste)

OPAC HELP

Titolo:
Scottish Ordovician ostracodes: a review of their palaeoenvironmental, biostratigraphical and palaeobiogeographical significance
Autore:
Williams, M; Floyd, JD; Miller, CG; Siveter, DJ;
Indirizzi:
British Geol Survey, Nottingham NG12 5GG, England British Geol Survey Nottingham England NG12 5GG ingham NG12 5GG, England
Titolo Testata:
TRANSACTIONS OF THE ROYAL SOCIETY OF EDINBURGH-EARTH SCIENCES
, volume: 91, anno: 2001,
parte:, 3-4
pagine: 499 - 508
SICI:
0263-5933(2001)91:<499:SOOARO>2.0.ZU;2-J
Fonte:
ISI
Lingua:
ENG
Soggetto:
SOUTHERN-BRITAIN; DRUMMUCK GROUP; IAPETUS OCEAN; SCOTLAND; ASHGILL; FAUNAS; GIRVAN;
Keywords:
biostratigraphy; palaeobiogeography; palaeoenvironments; Scotland;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Citazioni:
58
Recensione:
Indirizzi per estratti:
Indirizzo: Williams, M British Geol Survey, Nottingham NG12 5GG, England British GeolSurvey Nottingham England NG12 5GG 5GG, England
Citazione:
M. Williams et al., "Scottish Ordovician ostracodes: a review of their palaeoenvironmental, biostratigraphical and palaeobiogeographical significance", T RS EDIN-E, 91, 2001, pp. 499-508

Abstract

Ostracodes have a wide geographical distribution in the Ordovician of Scotland. They are known from the Southern Uplands, the Girvan district, the Highland Border region and the Inner Hebrides. Overall. more than forty species are recorded. They occur in clastic and carbonate rocks indicative of a range of shallow to deeper marine-shelf environments. Though many of the faunas are allochthonous, broad patterns of ostracode palaeoenvironmental distribution can be elucidated, and elements of the shallow marine Leperditella and open marine-shelf Anisocyamus associations (previously recorded from N America) are present. Indigenous faunas are absent from the deep marine sediments of the Southern Uplands Northern Belt. Ostracodes are known from the Arenig, Llanvirn, Caradoc and Ashgill series in Scotland; those of the latter two series have widest biostratigraphical value. In the Girvan district the Caradoc species 'Ctenobolbina' ventrospinosa, Krausella variata, Balticella decker! and Monoceratella teres have correlative value with N America, whilst the Ashgill species Kinnekullea comma appears to be a locum for the anceps graptolite Biozone in Britain, Ireland and possibly the eastern Baltic. The ostracodes are of typical Laurentian affinity, but show progressive generic links with the Baltic region during the late Llanvirn-Caradoc interval, and by Ashgill times display species-level links with southern Britain and Ireland. These distributional patterns suggest approaching geographical proximity for the early Palaeozoic continents of Laurentia, Baltica and Avalonia, and the ability of some Ordovician ostracodes to cross the Iapetus Ocean.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 15/07/20 alle ore 05:18:45