Catalogo Articoli (Spogli Riviste)

OPAC HELP

Titolo:
A TIDAL MODEL OF CARBONIFEROUS KONSERVAT-LAGERSTATTEN FORMATION
Autore:
FELDMAN HR; ARCHER AW; KVALE EP; CUNNINGHAM CR; MAPLES CG; WEST RR;
Indirizzi:
UNIV KANSAS,KANSAS GEOL SURVEY LAWRENCE KS 66047 KANSAS STATE UNIV,DEPT GEOL MANHATTAN KS 66506 INDIANA GEOL SURVEY BLOOMINGTON IN 47405 UNIV KANSAS,MUSEUM NAT HIST LAWRENCE KS 66045
Titolo Testata:
Palaios
fascicolo: 5, volume: 8, anno: 1993,
pagine: 485 - 498
SICI:
0883-1351(1993)8:5<485:ATMOCK>2.0.ZU;2-X
Fonte:
ISI
Lingua:
ENG
Soggetto:
DEPOSITS; ESTUARY; INDIANA; FACIES; SHALE; LACUSTRINE; RHYTHMITES; TRANSPORT; SEDIMENTS; ILLINOIS;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Science Citation Index Expanded
Citazioni:
76
Recensione:
Indirizzi per estratti:
Citazione:
H.R. Feldman et al., "A TIDAL MODEL OF CARBONIFEROUS KONSERVAT-LAGERSTATTEN FORMATION", Palaios, 8(5), 1993, pp. 485-498

Abstract

Rapid deposition of laminated sediments in tidally influenced estuaries can explain many characteristics of some Carboniferous Konservat-Lagerstatten. In modem environments each tide can potentially deposit a layer of normally graded mud. Localized depositional rates as high as 1 cm or more of sediment per week can occur in tidal estuarine settings. Characteristic periodicities in lamination thicknesses reflect neap-spring cycles and other earth-moon orbital parameters; these periodicities can be used to identify tidal deposits in Carboniferous rocks. Commonly preserved in tidal sedimentary rocks are neap/spring cycles and the semi-diurnal tidal inequality. Such deposits are widespread in the mid-continental USA. The major features of the tidal model of Lagerstatten formation are: sediment is delivered to the site by each tide;high rates of deposition result in rapid burial of carcasses at the sediment-water interface; high depositional rates, high turbidity, and fluctuating or brackish salinity reduce or prevent bioturbation, colonization by benthic invertebrates, and scavenging; the combination of semipermeable muddy sediment and high levels of organic carbon may leadto anoxic porewater, and will also prevent bioturbation and scavenging of buried skeletons. The superficial similarity of tidal laminationsto lacustrine varves and the general lack of marine benthos in tidal deposits can lead to mistaken limnic interpretations of mud-dominated parts of estuarine facies.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 06/07/20 alle ore 05:58:04