The maximum depositional age of the Pooranoo Metamorphics is contrained by detrital zircon dates of 1680 + /-14 Ma derived from arenaceous metasediments.
42.
The deposits are anomalously high in iron for deterital material, and exclude detrital iron deposits typified by scree of Murchison regions of Western Australia.
43.
Detrital production from clam excretion and death may fuel bacterial production, which may be circulated into the detrital food web, or microbial loop.
44.
Detrital production from clam excretion and death may fuel bacterial production, which may be circulated into the detrital food web, or microbial loop.
45.
Subsequently it was moved up river to a location, opposite Detrital Wash, which is its current GNIS location determined in an 1875 survey.
46.
When the algae decompose, they creates a " detrital rain " that falls to the lake bottom and sucks oxygen from the water.
47.
Age analyses of detrital minerals, petrology, and geochemistry all indicate that the island belongs geologically with the other islands of the Outer Banda Arc.
48.
However, younger late-Paleoproterozoic red bed successions contain zircons of this time interval as well as many ~ 2.0 Ga detrital zircons.
49.
Firstly, it is a supergene zinc ore body composed of alluvial accumulations of zinc carbonate and silicate minerals of detrital nature deposited within a palaeochannel.
50.
This is because carbon fixation into the detrital food web is not limited by stratification, turbidity or day length, all of which limit photosynthesis.
