7
- Triassic (?) system 109
- Bissett conglomerate 109
- General features 109
- Fossils and age 110
- Stratigraphic relations 110
- Bissett conglomerate 109
- Post-Bissett and pre-Cretaceous time interval 110
- Cretaceous system 110
- General features 110
- Lower Cretaceous (Comanche) series 112
- Trinity group Rose formation 112
- Glen Rose formation 112
- General features 112
- Local features 112
- East side of Marathon Basin 112
- South side of Marathon Basin 112
- West side of Marathon Basin 113
- Maxon sandstone 113
- General features 113
- Local features 114
- Age of the formation 114
- Glen Rose formation 112
- Fredericksburg group 114
- Walnut and Comanche Peak formations 114
- General features 114
- Local features 114
- Edwards limestone 115
- Walnut and Comanche Peak formations 114
- Washita group 115
- Georgetown limestone 115
- Del Rio shale and Buda limestone 115
- Trinity group Rose formation 112
- Upper Cretaceous (Gulf) series 116
- Eagle Ford formation 116
- Possible higher beds 116
- Quaternary system 116
- General features 116
- Gravel deposits 116
- Alluvium 117
- Igneous rocks 117
- Volcanic rocks 117
- Intrusive rocks 117
- General features 118
- Marathon Basin 119
- General features 119
- Marathon anticlinorium (including Dugout Creek area) 120
- General features 120
- Exposures of the Dugout Creek overthrust 120
- Structure of the overridden rocks 121
- Faults of the overriding block 121
- Folds of the overriding block 122
- Peña Colorada synclinorium 122
- General features 122
- Synclinal area south of Monument Spring 123
- Simpson Springs and East Bourland Mountain 123
- Woods Hollow Mountains 123
- Dagger Flat anticlinorium 123
- General features 123
- Structural features of the older rocks 124
- Folding in the younger rocks 124
- Folded overthrusts in the younger rocks 124
- Tear faults in the younger rocks 128
- Ridges southeast of the anticlinorium 128
- Synclinorial area between Tesnus and Gap Tank 128
- General features 128
- Folds 129
- Faults 129