Opal stalactites and stalagmites from a lava tube in northern California

• 1 July 1930
• journal article
• Published by American Journal of Science (AJS) in American Journal of Science
• Vol. s5-20  (115) , 22-26
• https://doi.org/10.2475/ajs.s5-20.115.22

Abstract

Keywords

• OPAL STALACTITES
• LAVA TUBE
• NORTHERN CALIFORNIA
• STALACTITES AND STALAGMITES