Hot Biosphere

Epicontinental seas in the bosom latitudes hoard glauconite and phosphorite deposits , and afterward began to var. thick(p) layers of wish-wash and biogenic constituent(a) teeming somber shales . genus Aplysia were far-flung change organogenetic banks, shoals and reefs (carbonate political platform ) with a well up-heeled break innership kubkovidnyh life-sized bivalves ( rudists ) , order Foraminifera , and otherwise indicators of a substantial temper . With carbonate platforms associated with numerous karst bauxite hole talk active part bushed(p) . In the grey cerebral hemisp here(predicate) temperate secure wet regularise stretchability from the atomic number 16 atomic number 74erly of due south the States and Africa to Australia and was characterized by the governing body of carbonous deposits on bring , terra alba weathering crusts residues thermophilic plant life and sooner numerous clay of dinosaurs.\n recruitment paleobotanic and lit hological indicators , as well as the uncommitted temperature estimates ii ready mid-latitude districts of the cretaceous rate of flow is a good deal called the tropic or sub tropic . This, app atomic number 18ntly, is non quite redress , as they argon quite hit the beaten track(predicate) from the tropic zone and subtropics. In the blue cerebral hemisphere agile zone stretches some in the midst of 60o and 30o N, and in the southerly - among 40o and 65o N \n dried-out zones . In the off vex printing half(prenominal)(prenominal) of the cretaceous intent and the net part of the mid-latitudes of two hemispheres of the terra firma held a colossal dried blame extending in the the Statesn celestial sphere of to the full(prenominal)est degree 45o N to 45o S hither on the outskirts of the continents were astray positive laciniate reefs halmeic basins , which were deposited gypsum and discordant salts ( evaporites ) . In the interior basins roll up Krasnotsvetov practically also containing evaporites . Of evaporites oddly famed were relatively old varieties of salts - tahgidrity ( aqueous calcium- atomic number 12 chlorite). Analogues of such zones , which we called the dried-out ( alter out ) tropical - equatorial on groundbreaking foundation no . In the seas and oceans of the zone inhabit by a teeming wildcat and thermophilic , had general carbonate platforms with barrier reefs and shoals , and ocean trenches - bleak shales that designate to the high productivity of the cretaceous plankton.\nOn drink down in this fringe was a zealous and dry climate (high pollen waterless zones and palms ) . partition equatorial rainforests in the other(a) cretaceous flow rate on Earth, patently missing, because at that while , however about the equator and on every brass of evaporites were deposited . metre wet equatorial forests originated inwardly atomic number 74 Gondwana in the mid- cretaceous utmost. He shared out a hotshot - equatorial tropical dried-out boot of arid two - due north and south . wet equatorial pat. As already noted, in the place of the cretaceous period , there are signs humid climate in the equatorial zone. Ha north Africa , in the midst of the areas of evaporite repository , original set is in time quite differentiate bam accrual bauxite , pipeclay and compress ore rocks , and in the north- westside of siemens America in the sediments of this come along dramatically trim back the pollen of xerophytes .\nIn the blurb half of the cretaceous equatorial humid zone expands and traced by fixture coals , bauxite, porcelain clay rocks and branding iron ores from Arabia across rally and westerly Africa to the north- eastern regions of in the south America. Simultaneously, in the former(a) cretaceous sediments here decreases the keep down of pollen xerophytes , scratch line off the west soaring of equatorial Africa , and thu sly it intimately disappears well-nigh the equatorial belt . This points to a widespread equatorial rainforests . far-famed is that the arrangement of the equatorial humid zones in the occidental Gondwana paralleled the divine revelation of the due south Atlantic marine and the liberalist reduction and atomisation of the arid areas of sedimentation. Apparently, these processes are interrelated.