The principle of which relative dating can be used at Siccar Point in Scotland to determine that the rocks below the unconformity were tilted to vertical before erosion occurred is the o<span>riginal horizontality. Thank you for posting your question here. I hope the answer helps. </span>
I believe the answer to your question is C
Answer:
e and c I'm pretty sure your welcome
Im pretty sure that it is...It is low in silica.
Hope this helps.....