the sequence
basically it's:
Volcanic deposits
Reworking of volcanic material by eolean processes
acidic alteration of basaltic material
impacts
continued eolean processes
impacts
eolean processes
impacts
continued eolean processes
impacts
eolean processes
impacts
continued eolean processes
impacts
eolean processes
impacts
continued eolean processes
impacts
eolean processes
impacts
continued eolean processes impacts eolean processes impacts continued eolean processes impacts eolean processes ...........
