Following extensive volcanic eruption, which process initiates pedogenesis?

💡 Explanation

Biological weathering by pioneer species directly initiates pedogenesis on sterile volcanic rock because lichens and mosses secrete acids that begin breaking the rock down; therefore, this process creates initial soil horizons rather than alternatives requiring existing sediment or water.

• Which process determines cirque orientation when valley glaciers form on mountains?
• Which mechanism causes the formation of explosive stratovolcanoes at subduction zones?
• Which thermal consequence arises where oceanic crust subducts beneath continental crust?
• Which ecosystem effect follows increased chemical weathering rates?
• Which pattern results when the Coriolis effect deflects prevailing winds in the Northern Hemisphere?
• Which outcome occurs when thawing overburden destabilizes Arctic slopes?