Holes and other openings in basaltic flow which are the result of trapped gas bubbles. Vesicles are often filled at a later date with a wide variety of materials, including, quartz, agate, zeolites, and many other minerals. Found on http://jersey.uoregon.edu/~mstrick/geology/geo_glossary_page.html
Holes and other openings in basaltic flow which are the result of trapped gas bubbles. Vesicles are often filled at a later date with a wide variety of materials, including, quartz, agate, zeolites, and many other minerals.