EPS SCI 103AIgneous Petrology
Earth, Planetary, and Space Sciences · 5 units · Undergraduate upper division (100-199)
Recommended: Chemistry 14B and 14BL, or 20B and 20L. Mineralogy, chemical composition, and field occurrence of igneous rocks with reference to their origin by melting in earth. Introduction to thermodynamics as applied to petrology. Formation of magma, its movement, eruption, crystallization, and chemical evolution. Petrologic structure of crust and mantle and its relation to seismology. Overview of petrological and chemical evolution of Earth, moon, and other planets from their origin to present.
P/NP or letter grading.
When it runs
- Spring 2026
- Spring 2027
Scheduled, not typical — from UCLA’s Schedule of Classes, which publishes Fall 2025 through Spring 2027 and nothing before it.
Requisites
Official UCLA wording
Requisite: course 51.
BruinTree reads · Prerequisite
confidence 1.00 · from UCLA’s structured dataRequires
Everything that has to come before this course, not just the courses named in the requisite above.
EPS SCI 103A
- EPS SCI 51Mineralogy: Earth and Planetary Materials
- EPS SCI 1Introduction to Earth Science
- EPS SCI 20Natural History of Southern California
- CLUSTER 70AEvolution of Cosmos and Life
1 direct requisite. The whole upstream is here — 4 courses over 2 levels. Every course here opens its own tree.
Unlocks
What this course is a requisite for, and what those courses lead to in turn.
EPS SCI 103A
- EPS SCI 103CMetamorphic Petrology
- EPS SCI 121Advanced Field Geology
- EPS SCI C126Advanced Petrology
- EPS SCI C226Advanced Petrology
4 courses list this as a requisite. The whole downstream is here — 4 courses over 1 level. Every course here opens its own tree.