Chattanooga

Eagle Ford

Rio GrandeEmbayment

Texas-Louisiana-Mississippi Salt Basin

Uinta Basin

Appalachian Basin

UticaMarcellusDevonian (Ohio)

Antrim

Barnett

Bend

New Albany

Woodford

Barnett-Woodford

Lewis

Hilliard- Baxter-

Mancos

Excello-Mulky

Fayetteville

Floyd-Neal

GammonCody

Haynesville

HermosaMancos

Pierre

ConasaugaWoodford-Caney

Pearsall-Eagle Ford

MichiganBasin

Ft. Worth Basin

Palo DuroBasin

PermianBasin

IllinoisBasin

AnadarkoBasin

Greater Green River Basin

Cherokee Platform

San JuanBasin

WillistonBasin

Black WarriorBasin

Ardmore Basin

Paradox BasinRatonBasin

Maverick Sub-Basin

Montana Thrust

Belt

Marfa Basin

Valley and Ridge Province

Arkoma Basin

Forest City Basin

PiceanceBasin

Shale Gas Plays, Lower 48 States

0 200 400100 300Miles

±Source: Energy Information Administration based on data from various published studiesUpdated: May 28, 2009

Stacked PlaysShale Gas Plays

Deepest / OldestShallowest / Youngest

Basins