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Santa Catalina Island

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Santa Catalina Island, Avalon, California, United States (33.38890 -118.42393)

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Name: Santa Catalina Island topographic map, elevation, relief.
Coordinates: 33.29875 -118.60644 33.47903 -118.30352
Minimum elevation: 0 ft
Maximum elevation: 2,087 ft
Average elevation: 135 ft

Santa Catalina Island

Catalina is primarily composed of two distinct rock units: Catalina Schist from the Early Cretaceous (95 to 109 million years ago), and Miocene volcanic and intrusive igneous rocks. The island is rich in quartz, to the extent that some beaches on the seaward side have silvery-grey sand. These formations originally occurred on the ocean floor and emerged from the ocean through tectonic activity. This means that the Santa Catalina Island land-mass was never directly connected to mainland California. Other geologic factors that contributed to the island topography include further geologic uplift and subsidence, tectonic plate movement, sedimentation, metamorphic activity, weathering, and erosion.

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Avalon

United States > California > Avalon > Avalon

Avalon, California, United States (33.34221 -118.32726)

Coordinates: 33.31758 -118.34666 33.39387 -118.27933 - Minimum elevation: 0 ft - Maximum elevation: 1,572 ft - Average elevation: 213 ft