1
Harris Hill Polk Leon Ellis Cass Baldwin Clarke Vernon Rusk Hunt Cameron Tyler Winn Union Mobile Bay Rapides Lee Lee Clark Smith Liberty Falls Dallas Drew Milam Jasper Pike Yazoo Sabine Walton Union Lamar Hinds Caddo Houston Collin Dallas Bowie Hale Allen Ashley Desha Perry Navarro Fannin Denton Clay Bibb Monroe Vermilion Sumter Fayette Hardin Jefferson Wilcox Gulf Jones Butler Attala Bolivar Tuscaloosa Panola Scott Shelby Jackson Perry Wood Newton Dale Grayson Wayne Shelby Bossier Grant Amite Pickens Walker Lafourche Liberty Rankin Anderson Calcasieu Cherokee De Soto Jasper Barbour Walker Marengo Copiah Coosa Grimes Terrebonne Jefferson Smith Red River Harrison Chicot Clarke Miller Trinity Choctaw Monroe Holmes Coffee Beauregard Natchitoches Greene Covington Escambia Kemper Okaloosa Leake Conecuh Tensas Lamar Chilton Hopkins Angelina Sevier Greene Freestone Carroll Acadia Jackson Washington Pike Santa Rosa McLennan Bienville Henry Elmore Clay Macon Limestone Henderson Kaufman Russell Fayette Iberia Avoyelles Plaquemines Warren Madison Sabine Van Zandt Bradley Ouachita Titus Brazos Leflore Robertson Nevada Montgomery Upshur Talladega Noxubee La Salle Lowndes Bullock Columbia Claiborne Stone Waller Webster Lamar Calhoun Iberville Howard Franklin Geneva Winston Lincoln Marion Newton Calhoun Burleson Madison Jackson Catahoula Nacogdoches Morehouse Tallapoosa Autauga Calhoun Pearl River Saint Landry Concordia Ouachita Tangipahoa Saint Tammany Sunflower Adams Escambia Simpson Houston Hempstead Calhoun George Wilkinson Franklin Forrest Neshoba Harrison Washington Livingston Lauderdale Richland Cleburne Holmes Montgomery Saint Clair Lincoln Randolph Crenshaw Chambers Cleveland Caldwell Saint Mary Chambers Evangeline Lafayette Lowndes Jefferson Marion Washington Tallahatchie Grenada San Jacinto Hancock Madison Sharkey Delta Webster Washington Claiborne Washington Orange Little River Jefferson Yalobusha Choctaw Walthall Saint Martin Chickasaw Rains Issaquena Lawrence Gregg Oktibbeha Orleans Jefferson Davis San Augustine Pointe Coupee Red River Morris Covington Humphreys East Carroll Franklin Camp East Feliciana Montgomery Saint Helena Saint Charles Assumption West Carroll Ascension Lafayette West Feliciana Saint Bernard Jefferson Davis East Baton Rouge Saint James Iberia Saint Martin Rockwall Saint John the Baptist West Baton Rouge Galveston Madison Lake Pontchartrain I55 I59 I20 I65 I10 I12 I10 I49 I10 I45 I20 I35 I30 I20 I85 Dallas Houston Birmingham Jackson Pensacola Mobile Waco Monroe Shreveport Montgomery Beaumont Alexandria Texarkana Longview Dothan Gulfport El Dorado Meridian Hattiesburg Baton Rouge New Orleans Texas Louisiana Alabama Mississippi Arkansas Florida 0 20 40 60 80 MILES 0 20 40 60 80 KILOMETERS EXPLANATION Total petroleum system boundary Cotton Valley Group Blanket Sandstone Gas—50490201 Cotton Valley Group Hypothetical Updip Oil—50590204 Cotton Valley Group Massive Sandstone Gas—50490202 Cotton Valley Group Updip Oil and Gas—50490203 Roads Cities Counties States Assessment-unit boundaries Gulf of Mexico 30° 35° 95° 90° 85° U.S. DEPARTMENT OF THE INTERIOR U.S. GEOLOGICAL SURVEY U.S. DEPARTMENT OF THE INTERIOR U.S. GEOLOGICAL SURVEY DIGITAL DATA SERIES DDS–69–E CHAPTER 2, PLATE 1 ASSESSMENT UNITS OF THE COTTON VALLEY GROUP, TEXAS, LOUISIANA, MISSISSIPPI, ALABAMA, AND ADJACENT STATES By T.S. Dyman and S.M. Condon 2006 INDEX MAP Chapter 2
