7) is the only place where there is clearly no tectonic discontinuity between the limestones and the underlying detrital
Specifically, detritus based food webs are not isolated from aboveground consumption; and, aboveground predators are quite capable at feeding at the belowground interface, making use of that majority of ecosystem production that has become a part of the detrital
Although some lines of reasoning lead to the conclusion that detrital
food webs should exhibit strong donor control (Pimm 1982), examination of the complexity of possible trophic interactions leads to the prediction that either an increase, no change, or even a decrease in predators is a possible outcome to enhancement of the resource base of a detritus-based web (Abrams 1993, Persson et al.
47) contents further indicate that weathering clay minerals with more radiogenic Sr and lower Sr content should have had an important role in the detrital
input to oil shale.
This unit contains detrital
zircon grains as young as ca.
Dolomite cementation was accompanied by displacement and deformation of detrital
No regularity over space and time exists in the transportation between the initial erosion and final deposition of the detrital
Layer D is rich in clay minerals, but in IR no particles similar to terrigenous detrital
quartz grains were found.
2007) reported a prominent Ordovician population of detrital
zircons in the Berwick Formation probably derived from an emergent Casco Bay/Falmouth-Brunswick terrane.
The deltaic sandstone of the Khojak Formation, turbidite succession of the Panjgur Formation and molasse strata of the Muree Formation (Himalayan fore lands) have recorded outstandingly similar detrital
modes (Critelli and De Rosa, 1987; Critelli et al.
Besides pyrite, all of the studied samples also contain iron-titanium oxides with a variable Fe/Ti ratio scattered as micrometre-sized or smaller possibly detrital
particles within the calcite or dolomite matrix (Fig.
The results revealed that detrital
input is possibly the main source of kaolinite, chlorite and illite, while in situ neoformation during the Tertiary shallow saline and alkaline environment could be the dominant cause of palygorskite occurrences in the sedimentary rocks.