In India, a large amount of thorium ore can be found in the form of monazite in placer deposits of the Western and Eastern coastal dune sands, particularly in the Tamil Nadu coastal areas.
22.
The route crossed the Colorado River from New Mexico Territory at present day Yuma, Arizona to Fort Yuma in California, then descended into Baja California Mexico for to avoid the Algodones Dunes sand barrier in the dry southern Colorado Desert.
23.
Thorkild Jacobsen considered this " " Idedin " canal " referred to an unidentified " Desert Canal ", which he considered " " probably refers to an abandoned canal bed that had filled with the characteristic purplish dune sand still seen in southern Iraq . ""
24.
The only exposed sediments of the Perth Basin, west of the fault, are of Cenozoic age, and comprise the material such as sandy limestone, travertine and dune sand on which the city of Perth is built, including sand dunes of Pleistocene age formed during the last Ice Age.
25.
Beach sands with shell fragments and estuarine muds were deposited and later overlain by calcrete-cemented dune sands as the sea retreated . " Dune rock " that was deposited during a Pleistocene interglacial period about 120, 000 years ago is now being eroded in the sea-cliffs near Swartklip.
26.
Sands and gravels from the Pliocene to the Pleistocene eras are the next most widespread geologic units, covering 26 % of Evans County, followed by unconsolidated deposits of rock and sand in marsh and lagoonal facies, covering 10 % of the area, and finally dune sand at 0.87 % of the area.
27.
The degree to which the original Cape Fold mountains ( formed during the Carboniferous and early Permian Periods ) have been eroded is attested to by the fact that the 1 km high Table Mountain on the Cape Peninsula is a Malmesbury shale and granite basement on which this anticline mountain rested also formed an anticline; but being composed of much softer rocks, readily eroded into a 50 km wide flat plain, ( now covered with dune sands ) called the " Cape Flats ".
28.
Forming a transition zone between the coast and dune formations ( Saint-Palais-sur-Mer, La Palmyre ), they are a relic of the former Gulf of Arvert which became the Barbareu Pond in the Middle Ages, which initially connected to the sea by a small outlet ( cove " Brajado ", now Br�jat ) has gradually filled over the centuries, under the action of masses of dune sands which have cut off all communication with the estuary of the Gironde.
