Other intrusive igneous rocks include gabbro, diorite, syenite, monzonite, granodiorite, monzodiorite, anorthosite, troctolite, peridotite, and pyroxeneite.

Extrusive igneous rocks include dacite, andesite, phonolite, and trachyte when classified by composition, and tuff, and scoria in terms of texture.

Harrison Schmitt was the first and only geologist to land on the moon. Schmitt was the Apollo 17 Lunar Module Pilot. Apollo 17 was the last manned lunar landing. As LMP, it was Schmitt's job to tell the commander, Gene Cernan, speed and elevation during the lunar landing.

On the surface, Schmitt helped set up the experiments. After that, they boarded the Lunar Rover and drove to explore pre-designated spots. It was Schmitt's job to use the maps to guide Cernan to the geologic sites. On the way, Schmitt also described the sites he saw for the benefit of scientists at Missino Control.

While on the Moon's surface, Schmitt collected the rock sample designated Troctolite 76535, which has been called "without doubt the most interesting sample returned from the Moon". Among other distinctions, it is the central piece of evidence suggesting that the Moon once possessed an active magnetic field. Schmitt also found the orange soil near Shorty Crater. Orange soil is significant because it is proof of volcanoes on the moon. The moon has a very thick 60km crust. It has been volcanically inactive for the last 3 billion years.

Harrison Schmitt was the first and only geologist to land on the moon. Schmitt was the Apollo 17 Lunar Module Pilot. Apollo 17 was the last manned lunar landing. As LMP, it was Schmitt's job to tell the commander, Gene Cernan, speed and elevation during the lunar landing.

On the surface, Schmitt helped set up the experiments. After that, they boarded the Lunar Rover and drove to explore pre-designated spots. It was Schmitt's job to use the maps to guide Cernan to the geologic sites. On the way, Schmitt also described the sites he saw for the benefit of scientists at Missino Control.

While on the Moon's surface, Schmitt collected the rock sample designated Troctolite 76535, which has been called "without doubt the most interesting sample returned from the Moon". Among other distinctions, it is the central piece of evidence suggesting that the Moon once possessed an active magnetic field. Schmitt also found the orange soil near Shorty Crater. Orange soil is significant because it is proof of volcanoes on the moon. The moon has a very thick 60km crust. It has been volcanically inactive for the last 3 billion years.