Micropaleontologic Proxies for Sea-level Change and Stratigraphic Discontinuities
نویسندگان
چکیده
oxygen minimum zone dynamic coastal and shelf fronts thermocline tidal mixing runoff high energy turbidity daily–seasonal fluctuations in temperature & salinity ± high productivity halocline shelf break
منابع مشابه
Sequence concepts at seismic and outcrop scale: the distinction between physical and conceptual stratigraphic surfaces
The sequence stratigraphic terms maximum flooding surface and downlap surface, as currently applied, are ambiguous. Examples of these intra-sequence surfaces are summarised from high frequency mid-Pleistocene sequences and from a Cretaceous–Recent seismic megasequence, both from New Zealand. At any one locality, a mid-Pleistocene sequence contains up to four stratal discontinuities, in ascendin...
متن کاملTwo models: global sea-level change and sequence stratigraphic architecture
Two different conceptual models underlie the application of sequence stratigraphy by Exxon stratigraphers and later researchers. One, the global sea-level model (GSM), relates to presumed sea-level behaviour through time; the other, the sequence stratigraphic model (SSM), relates to the stratigraphic record produced during a single cycle of sea-level change. Though the two models are inter-rela...
متن کاملSea Level History
Bilal U. Haq and his co-workers have completed an important update of the chronology of coastal onlap and eustatic fluctuations in Mesozoic and Cenozoic time (1). Seismic stratigraphic results are augmented in the new charts by outcrop and well-log studies to document an impressive total of 119 sea level cycles since the beginning of the Triassic. In addition, the Cretaceous results have been p...
متن کاملIce sheets and sea level of the Last Glacial Maximum
This paper outlines the general issues regarding ice sheets and sea level of the Last Glacial Maximum (LGM), which formed the basis of an EPILOG Project workshop. Papers in this special issue of Quaternary Science Reviews provide a comprehensive assessment of these issues from the perspective of geological reconstructions of ice sheet extent, records of sea-level change, ice sheet modelling, ge...
متن کاملSequence Stratigraphy of the Neoproterozoic Infra Krol Formation and Krol Group, Lesser Himalaya, India
A sequence stratigraphic study of terrigenous and carbonate rocks of the Infra Krol Formation and Krol Group in the Lesser Himalaya fold and thrust belt of northern India was undertaken as part of a broader investigation of the significance of carbon isotope data in Neoproterozoic successions. Eight regional stratigraphic discontinuities were traced over a distance of nearly 300 km, and interpr...
متن کامل