Abstract by Rowan Huang
Quantitative Analysis of Caldera Shape
Calderas are a volcanic depressions that typically form by collapse of overlying rock into underlying magma reservoirs following eruptive emptying. They can be classified as ash flow, basaltic shield, and stratocone. Volcanic depressions on other planetary bodies, such as ionian paterae, are often harder classify. If the three types of terrestrial calderas can be shown to have distinct morphological differences, one may be able to use these differences to classify an otherwise undefined planetary caldera and gain insight into its origin, which in turn would have important implications for planetary histories. We use morphometric techniques originally applied to shards of volcanic ash to quantify caldera shape. Through this method and statistical analysis, particularly discriminant analysis, of the resulting data, we find that there is a relationship between shape and caldera type.