Abstract: The northern Madrid Basin contains paleosols and lacustrine sequences composed of ordered dolomite. Smectite-rich mudstones with analcime deposited in distal alluvial fans affected by pedogenic processes. Mudstones contain dolomite and silica laminae interpreted as mineralized root-mats. Dolostones with prismatic structure constitute Stage III dolocretes. Homogeneous lacustrine dolomudstones show some features indicative of subaerial exposure. Dolomite textures include: microcrystalline dolomite, coarse crystalline mosaics located in root cavit...
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Topics: 
Geochemistry
Mineralogy