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The Mid-Cretaceous epicontinental sea covered the central part of the Russian Craton (RC). It was differentiated into a series of syn-sedimentary highs and lows. The highs are called phosphate platforms. They are confined to inherited tectonic uplifts where Precambrian basement is very shallowly buried and earlier Mesozoic and Palaeozoic sediments are thin or wedged out altogether. Cenomanian sediments...
Cenomanian nodular phosphorites are widespread over vast areas of the Precambrian East European Platform (EEP). They are found in various parts of the Cenomanian forming thicker and richer beds close to the Cenomanian/Turonian boundary. They are encountered nearly ubiquitously, but are concentrated on synsedimentary highs in thin and condensed sequences with numerous hiatuses. All of the economic...
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