31. Thus detrital ferric hydroxides, including goethite and ferrihydrite, will spontaneously transform into red-colored hematite pigment with time. 32. Detrital sediments were washed in by rivers from the continent, over the limestone reefs which formed the shallow sea floor.33. The Mississippian later on changes into the nearly 1000 m thick detrital , syn-orogenic sediments of the Kulm facies. 34. The biogeochemical model contains 4 phytoplankton groups, four nutrient groups, a single herbivore group, and three detrital pools. 35. This moray eel likes shallow and detrital waters from lagoons and external reef slopes up to 132 feet ( 40 meters ). 36. As documented by the dating of detrital zircons, this disconformity is estimated to represent a period of about 75 million years. 37. The river beds were at the time a rich humic swamp with thick vegetation, and accumulation of peats or thick detrital vegetation. 38. The Detrital Valley bordering Sacramento Valley and Wash north and northwest of Kingman, is part of the southeast region of Lake Mead. 39. The source region of the detrital material was the Aragon / Pyrenees domain that was undergoing a " first epirogenetic uplift ". 40. In 2012, further studies of detrital zircons taken from quartz-biotite schists in the NGB reported a maximum age of 3780 Ma.
