Interlude B. Soil

Question 1

where does clay come from

Answer 1

feldspar is chemically weathered from felsic rocks and then precipitates

Question 2

what causes jointing

Answer 2

freeze thaw (sometimes including water: frost wedging)

Question 3

salt wedging

Answer 3

salt precipitates

Question 4

how is soil formed

Answer 4

debris production, interactions with water, organic matter

Question 5

soil layers

Answer 5

topsoil, transition, subsoil, weathered bedrock

Question 6

soil forming factors

Answer 6

climate, substrate (in rock), steepness, time