Evolution of endogenic processes is indicated by simulated melt production rate and mare basalt volume. Evolution of exogenic process is indicated by impactor kinetic energy. The points represent ages ...

Evolution of exogenic process is indicated by impactor kinetic energy. The points represent ages of lunar samples produced from different geologic processes. The three evolution phases are designated ...

The Planetary Geology Department studies the solid surfaces of planets, moons, and small bodies in the solar system. Geological mapping as well as morphological and spectral analyses provide a record ...

THE perusal of Dr. M‘Nab's reply to my short article on the existence of an exogenous process of growth amongst the cryptogamic stems of the coal measures, confirms my previous conviction that the ...