[ECOLOG-L] Aspect

[Mark Wilson]

Hi folks,
I am looking for a reference which states
(1) that in the northern hemisphere the north side of boulders are
less exposed to the sun than the south side
and
(2) that the east side of boulders are exposed to the sun only in the
morning when temperatures tend to be cooler while west sides are
exposed during the afternoon when temperatures tend to be higher and
as a result the north and east side of boulders are likely to stay
cooler and damper longer.
Any suggestions?
Mark