Earth Science, Geologic Time & Fossils

Shoemaker, Gene

American astrogeologist

Nephelinite

lava

Plectoceras

fossil cephalopod genus

Precipitation

weather

Espy, James Pollard

American meteorologist

Theropod

dinosaur suborder

Ice Age

Definition & Facts

Pitchblende

mineral

Challenger Expedition

oceanography

Richthofen, Ferdinand Paul Wilhelm, Freiherr Von

German geographer

Tetractinella

fossil brachiopod genus

Diplograptus

graptolite genus

Sinter

mineral

Superposition, Law Of

Definition & Facts

Indian Summer

meteorology

Geikie, Sir Archibald

British geologist