Answers are grounded in this paper and cite their sources.
A cave (60 ft. x 30 ft. x 17 ft.) occurs within Jurassic dolerite 600 ft. from the surface. It was formed by zeolitization of a zone in the dolerite followed by solution of the secondary minerals to leave a cavity.
No takes yet. Share an insight, caveat, or question.
Hale et al. (1964) studied this question.
Synapse has enriched 10 related papers. Consider them for comparative context: