If Fe2O3 and CaO concentration is relatively higher in continental sediment than PAAS value, which climate occurred in the source area?

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Christopher Robert Scotese

Warm Temperate - like SE USA. Enough rainfall to oxide the iron and weather the limestones, but not enough rainfall to wash it w=away.

B. P. Singh

Higher Fe2O3 suggests oxidising environment under a warm and humid climate, while CaO indicates its incomplete removal. Therefore the climate may be subtropical.

Himadri Basu

Higher Fe2O3 is undoubtedly due to oxidizing environment. For CaO, you need to see its source - detrital feldspar or calcite cement. Calcite cement is generally characteristic of warm and arid climate.