You are browsing the archive for amygdale Archives - Georneys.
September 8, 2014
Monday Geology Picture(s): Vesicular Basalt Boulder, Mauritius
Continuing with some pictures from my trip to Mauritius back in March, for this week’s “Monday Geology Picture” post I am sharing some pictures of a large boulder of vesicular basalt. This particular boulder is located in the town of Grand Gaube in northern Mauritius and is used as a decorative stone on which a plaque has been mounted. Vesicular basalt is a dark-colored volcanic rock that contains many small holes, …
November 4, 2012
Geology Word of the Week: A is for Amygdale
def. Amygdale (also spelled Amygule): Vesicles, generally in extrusive igneous rocks, that are filled with secondary minerals, most commonly quartz, calcite, chlorite, and zeolite. When a rock contains amygdales, geologists often describe it as an amygdaloidal rock. For example, basalt is often described as amygdaloidal basalt. Here are a few previous, related geology words of the week that may be of interest: V is for Vesicle (and Vug) Z is …