The best soils are in the west section, where limestone clays or shell marls are common. [Please select]
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_) From this second turning, the gallery continued close to the line of separation of the marls and the tufas. [Please select]
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Throughout the marls and clays of the Bad Lands (of South Dakota) there is a large amount of potash. [Please select]
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_Palaeolagus_, a fossil hare found in the Miocene of Dacota and Colorado, _Panolax_ from the Pliocene marls of Santa Fe, and _Praotherium_ from Pennsylvanian bone-caves. [Please select]
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