Geologic Periods
G
E
O
L
O
G
I
C
T
I
M
E
L
I
N
E
Neocene (Quarternary) -Present-1.8 million years ago
Paleocene (Tertiary) -1.8-65 million years ago
Cretaceous-65-144 million years ago
Jurassic-144-206 million years ago
Triassic-206-248 million years ago
Permian-248-290 million years ago
Pennsylvanian-290-323 million years ago (Carboniferous Period)
Mississippian-323-354 million years ago (Carboniferous Period)
Devonian-354-417 million years ago
Silurian-417-443 million years ago
Ordovician-443-490 million years ago
Cambrian-490-540 million years ago
Precambrian-540-4600 million years ago
Creation of the Universe
Nebula Theory
Big Bang Theory
Home
Teachers
Students
Maps
Geologic Timeline
About
Topic
Photo Album
Photo Gallery
To view pages select a topic from below.
Igneous Intrusions (Dikes)
Glacial Boulders
Mountains
Stone Structures
Rock Formations
Notches
Old Man of the Mountain
Old Man of the Valley
Crawford Notch
Waterfalls