In the Beginning! Early Earth -formed about 4.6 billion years ago (4.6 x 10 9 ) - age determined by radiometric means -Moon rocks 4.3 b.y.o -Oldest.
Introduction to Volcanoes! 8SCIENCE ECUADOR PASTO INDONESIA MEXICO COSTA RICA.
Earthquakes, Volcanoes, and Mountain Building. Tectonic Plate Boundaries Convergent: Tectonic plates collide Divergent: Tectonic plates move away from.
Introduction to Volcanoes!
