Rock Structures. Mt. St. Helens, October 2004. Igneous Structures: Plutons, Volcanoes, & Lava Flows (Oh, My!). Plutons. Name this Igneous Feature…. Igneous Dike. Plutonic Structures. Xenoliths. Source: William E. Ferguson. Why do we find Plutons at the Surface?. Uplift & Erosion.
Mt. St. Helens, October 2004
Source:William E. Ferguson
Uplift & Erosion
Sierra Nevada Mountains Batholith, California
Outcrop of turbidites, Carboniferous, northwestern China.
Miocene Mammal (WA)
Worm Burrows: Middle Silurian, Grimsby Formation, Hamilton, Ontario