Sentences with word «depositional»
"Depositional" refers to the process of depositing or laying down sediment or other materials, typically by the action of water, wind, or ice. Full definition
Bart, P.J., Anderson, J.B., Seismic Expression of Depositional SequencesAssociated with Expansion and Contraction of Ice Sheets on the Northwestern Antarctic Peninsula Continental Shelf, 1996, Geological Society Special Publication No. 117, p. 171 - 186.
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This page provides a visual approach to exploring both glacial and fluvioglacial depositional features.
«With more detailed mapping of glaciovolcanic sequences, and the recognition of the importance of these often abrupt changes in depositional environment, our understanding of glaciovolcanic eruptions and the hazards they pose can only be advanced.»
Average depositional rates vary widely in the region of 0.1 mm per year.
They report that these methane hydrates were found in «coarse - grained sand - rich depositional systems in the Krishna - Godavari basin» and are Continue reading Methane Hydrates Have a Bright Future →
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They report that these methane hydrates were found in «coarse - grained sand - rich depositional systems in the Krishna - Godavari basin» and are more easily mined than the methane hydrates off the United States continental shelf.
However the geology of the coast is complex due to varied depositional events, colliding plate tectonics and earthquake faults.
This involves looking for what Horton calls «depositional places» — coastal plains, coastal lake bottoms, any place to plunge a hollow metal cylinder six or seven meters down and produce a readable sample.
Despite the fact that impact force and exposure time to dusty gas declined toward PDCs periphery up to the survival conditions, lethal temperatures were maintained up to the PDCs extreme depositional limits.
Depositional phasing of volcanic aerosols in the WAIS Divide ice core over the past 2400 years.
It's all centered around a court case, giving the narration an undeniably depositional vibe.
We study modern Mississippi River sand depositional patterns to find oil and natural gas buried in deeply buried stratigraphic traps.
These snowflakes are large enough to fall by depositional growth alone.
We used a geotechnical model that was empirically calibrated by performing tests on surface sediments from modern depositional environments analogous to those encountered in the sediment core.
(b) Sources (S1 to S10) and typical depositional areas (D1 and D2) for Asian dust indicated by spring average dust emission flux (kg km — 2 per month) averaged over 1960 to 2002.
As sedimentary basins subside, they preserve a geochemical, mineralogical, sedimentary, and paleontological record of evolving depositional environments.
In continental fluvial and coastal sections, changes in siliciclastic depositional facies reflect on increased frequency of high - energy events (e.g., extreme flooding), possibly from monsoon - like seasonal rains, and / or from unusually intense and / or sustained extra-tropical storms.
In organic geochemistry, compound specific isotope analyses and new biomarker methods are valuable for interpreting depositional environments, tracing fluid flow patterns, and understanding oceanic processes (Cubitt and England, 1995; Waples and Machihara, 1991; Schoell et al., 1994).
Monte Carlo simulations of a sedimentary noise model that links the intensity of sedimentary noise to sea - level change provides an independent method for simultaneously estimating geologic time and sea - level change from astronomically forced depositional successions.
Sea - level change reconstruction based on marginal marine depositional sequences is a difficult task that depends on subjective sedimentological interpretation.
Thick - bedded limestone with hummocky cross-stratification at the base of the Helongshan Formation indicates a relatively high - energy depositional settings57.
In this application, the model is assumed to be valid for slope and basin environments at water depths of several meters to several hundred meters that are near or just below storm - wave base, where storms, tides, bioturbation, and unsteady depositional rate are expected to exert measurable influence (noise) in sedimentary records.
There are a number of different types of proxy data types in this group including glacial deposits, glacial erosional features, shoreline features, aeolian deposits, lake sediments, relict soil deposits, and speleothems (depositional features like stalactites and stalagmites).
The Masters thesis measured and scientifically analyzed energy inputs in creating depositional environments.
«When we confirm the presence of these algal biomarkers in our sediment layers, it allows us to draw conclusions on the depositional environment and the environmental conditions at the respective time,» says Stein.
The researchers determined the depositional age of the two stalagmites, collected in Qal» e Kord Cave in central northern Iran, using a technique called uranium - thorium geochronometry conducted in the UM Rosenstiel School's Neptune Isotope Lab.
The MIS 5a palaeosol is overlain by massive sands, representing a major change in the depositional regime, which we interpret as evidence for climatic desiccation at the start of the last glacial period (MIS 4), which would be consistent with other dated records for the region [13], [16], [18], [30].
Timing and depositional environments of a Middle Pleistocene glaciation of northeast England: New evidence from Warren House Gill, County Durham.
The latter events left behind distinctive rock - sequences typically consisting of tillites (ancient boulder - clay, now solid rock) representing ice - deposited debris, overlain with a depositional break by cap - carbonates (chemical sediments of marine origin deposited during interglacials following global sea - level rises).
Davies, B.J., Roberts, D.H., Bridgland, D.R., Ó Cofaigh, C., Riding, J.B., Demarchi, B., Penkman, K. & Pawley, S.M. Timing and depositional environments of a Middle Pleistocene glaciation of northeast England: New evidence from Warren House Gill, County Durham.
Serious concerns still exist about the possibility that natural processes of bone breakage created the artifacts (Yesner 1996b: 256, Wilson and Burns 1999:217), and about the depositional complexities (Hoffecker, et.
All the specialists agreed that there were indisputable human artifacts in a primary depositional context mantled by a peat layer and without indication of materials deriving from later depositional horizons at the site (Adovasio and Pedler 1997:578).
Their on - site visit focused on depositional circumstances, confirmation of stratigraphy, validation of depositional context, anthropogenic reality of alleged living structures, and potential sources of carbon contamination at or near the site (Adovasio and Pedler 1997:577).
OSL dating provides an estimate of the time elapsed with latest period of burial and thus, yields a depositional age (Fig. 1).
Cursor movement keys or arrow keys are buttons on a computer keyboard that are either programmed or designated to move the cursor in a specified direction A cay forms when ocean currents transport loose sediment across the surface of a reef to a depositional node, where the current slows or converges with
The wood charcoal identifications were also used to identify indigenous versus introduced species in order to clarify the depositional.
A cay forms when ocean currents transport loose sediment across the surface of a reef to a depositional node, where the current slows or converges with I have the main keys available in reproduction for $ 10.
This lesson looks into the depositional features created in the lower course of a river.