Igneous Rocks. Composition, Texture and Classification, Description and Occurrence. By Joseph P. Iddings. In Two Volumes. Vol. i. Pp. xi + 464 + 3 plates.

Use Figure 3.4 to help classify igneous rocks, and to distinguish the mineralogy and general chemical composition of different igneous rocks. Use Appendix B and/or the flow chart given in class to ...

Erg Chech 002, a 4.6-billion-year-old meteorite found in Algeria in May 2020, shows signs of magmatic differentation, suggesting it formed in the crust of a protoplanet.