The epsilon Nd (\(\epsilon_{Nd}\)) is a widely used parameter to understand the processes of rock forming, i.e. petrogenetic processes from both geochemical and geochronological approach. By definition, \(\epsilon_{Nd}\) is the difference of \(^{143}Nd/^{144}Nd\) of rock sample and ‘chondritic uniform reservoir’ at the time in the past T. For a rock of age T, \(\epsilon_{Nd}(T)\) is the ‘initial’ value of \(\epsilon_{Nd}\); the value at the time of crystallization of the rock, and…

This post create a hillshade topography map in Python using earthpy

We download the precompiled data of adakite from GEOROC database. For a simple impression of adakite, the wikipedia page gives some clue: Adakites are volcanic rocks of intermediate to felsic composition that have geochemical characteristics of magma thought to have formed by partial melting of altered basalt that is subducted below volcanic arcs.