quote:
minnemooseus:
I think the characteristics of the two are clearly distinguishable.
KP:
thats why i asked if that if they can be, how you could, and then that they shoud be tested.
To have a volcanic caldera, you must first have a volcano. If there are no volcanic rocks present, that eliminates it being a caldera.
Even if volcanic rocks are present, impact structures show characteristics such as high pressure formed minerals and related fracture patterns.
Moose
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BS degree, geology, '83
Professor, geology, Whatsamatta U
Old Earth evolution - Yes
Godly creation - Maybe