calcretes造句

• The classification denotes red-coloured soils ( sometimes called " red rendzinas " ) which develop in or on the calcretes in regions where the modern Mediterranean climate is predominant.
• One of the world's largest deposits of calcrete is in the Makgadikgadi Pans in Botswana, where surface calcretes occur at the location of a now-desiccated prehistoric lake.
• The age of these deposits is demonstrated by the presence of multiple interglacial calcretes interbedded in these glaciofluvial deposits, sequences of sediments with normal, reverse, and normal magnetostratigraphy, optically stimulated luminescence dating, and unconformity truncated clastic dikes.
• Based on the presence of multiple interglacial calcretes interbedded with flood deposits, magnetostratigraphy, optically stimulated luminescence dating, and unconformity truncated clastic dikes, it has been estimated that the oldest of the Pleistocene Missoula floods happened before 1.5 million years ago.
• Based on the presence of multiple interglacial calcretes interbedded with glaciofluvial flood deposits, magnetostratigraphy, optically stimulated luminescence dating, and unconformity truncated clastic dikes, it has been estimated that the oldest of these megafloods flowed through the Channel Scablands sometime before 1.5 million years ago.