In his paper published in the July Bulletin1 Dorsey, discussing as a class those oil fields of the United States which are productive from porous rocks below unconformities of major importance, states his belief that “an impartial survey of the geological data affords no evidence either that the oil was formed in post-unconformity time or was introduced at a later date.… If this belief is accepted,” he continues, “the problem of preserving the oil during exposure and erosion of its reservoir rocks must be squarely faced.” He then undertakes to point out a protective mechanism.

Not only is the...

First Page Preview

First page PDF preview
You do not have access to this content, please speak to your institutional administrator if you feel you should have access.