Northeast Valley & Ridge, Virginia - East of North Mtn Fault – Northern Appalachians

#810, project 1, show in map.

Age (Ma)
400395390385
Paleozoic
Devonian
Middle Devonian
Givetian
Eifelian
Early Devonian
Emsian
Mahantango
Marcellus Shale
Purcell
Tioga Bentonite
Needmore Shale
4.4 Ma
425420415410
Paleozoic
Devonian
Early Devonian
Pragian
Lochkovian
Silurian
Pridoli
Ludlow
Ludfordian
Gorstian
Ridgeley Sandstone
Helderberg Limestone
Keyser Limestone
Tonoloway Limestone
Wills Creek
Bloomsburg
McKenzie
2.2 Ma
440
Paleozoic
Silurian
Wenlock
Homerian
Sheinwoodian
Llandovery
Telychian
Aeronian
Rhuddanian
Ordovician
Late Ordovician
Hirnantian
Massanutten Sandstone
5.2 Ma
535530525520515510505500495490485480475470465460455450
Paleozoic
Ordovician
Late Ordovician
Katian
Sandbian
Middle Ordovician
Darriwilian
Dapingian
Early Ordovician
Floian
Tremadocian
Cambrian
Furongian
Stage 10
Jiangshanian
Paibian
Series 3
Guzhangian
Drumian
Stage 5
Series 2
Stage 4
Stage 3
Terreneuvian
Stage 2
Fortunian
Sandstone Member of Martinsburg Formation
Turbidite Member of Martinsburg Formation
Black Shale Member of Martinsburg Formation
Lantz Mills Member of Edinburg Formation
Oranda Formation
St Lake Limestone Member of Edinburg Formation
Liberty Hall Member of Edinburg Formation
Botetourt Limestone Member of Edinburg Formation
Lincolnshire Limestone
New Market Limestone
Pinesburg Station Dolomite
Rockdale Run Formation
Stonehenge Limestone
Stoufferstown Member of Stonehenge Limestone
Conococheague Formation
Big Springs Station Member of Conococheague
Elbrook Formation
Waynesboro Formation
Shady Dolomite
Antietam Formation
Harpers Formation
Weverton Formation
14.3 Ma
550
Neoproterozoic
Ediacaran
Catoctin Formation
Swift Run Formation
482.5 Ma
1,100
Mesoproterozoic
Stenian
Pedlar Formation