depositional sequence

depositional sequence

[‚dep·ə′zish·ən·əl ′sē·kwəns]
(geology)
A major but informal assemblage of formations or groups and supergroups, bounded by regionally extensive unconformities at both their base and top and extending over broad areas of continental cratons.
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References in periodicals archive ?
Due to the unique position of Shuidonggou, dating of the depositional sequence at the site has received considerable attention.
The Mosquito Lake Road Formation is contemporaneous with the terminal stages of depositional sequence 2-4 unconformity; therefo re, it contains the only Early Cambrian volcanic rocks within this "group".
To meet the prerequisites of a geological structure, the model framework is based on a clear well-organized depositional sequence dividing sedimentary strata by adherence to tectonic sequences.
Oligocene-Miocene ramp system (Asmari Formation) in the NW of the Zagros basin, Iran: Microfacies, paleoenvironment and depositional sequence.
The depositional sequence in each subbasin typically consists of (i) a thick basal coarse-grained alluvial succession that rests unconformably on older basement rock, overlain by (ii) a dark-grey, fine-grained lacustrine succession, which is overlain conformably to unconformably by (iii) an upper coarse- to fine-grained alluvial succession.
Analyses of foraminiferal assemblages contained in eight core samples reveal the paleoenvironmental history of the Paleocene Gulf of Mexico as recorded by the TLM depositional sequence.
Geesaman and Scott (1989) and Garfield and Longman (1989) divided the Fusselman into two informal units in the subsurface of the central Midland Basin, a lower Fusselman and an upper Fusselman, each of which represents a separate depositional sequence.
According to New Concept's geologist, holes drilled adjacent to those of the discovery fan, and the fan itself, with offsets of 15 feet between holes, indicate the two gold zones may be of the same depositional sequence in time, but occupy separate fault structural zones, the latter truncating the former and possibly representing a mineralized cauldera-related ring fracture complex.
For each depositional sequence (C1-C5) PAE areagrams were generated to determine changes in area associations between depositional sequences using the parsimony tool in PAST 2.
The author also suggested the potash minerals "are of the same composition and depositional sequence and depth as the potash at Unity and Saskatoon, Saskatchewan", currently the location of a number of potash mines.
In general, it contains a continuous depositional sequence with shallow water Wenlockian to Pridolian rocks at the base overlain by intertidal to subaerial Lochovian units (e.
The Mangazea Formation is interpreted as a highstand systems tract of the Mangazea depositional sequence (Kanygin et al.