;D
*is puzzled*
I'm not sure about the pits and the chasm, but AIR there is at least one place in seed 0 (generating in v0.27.169.33a) near the lower-right corner that seems to qualify as far as moist subarctic forests and magma are concerned (I'm not certain how close the water is to the magma, but there must be some otherwise there wouldn't be trees).
Kind of.