A Survey of Potential Natural Landmarks, Geologic Themes, of the Western Central Lowlands

摘要

This study is one of a series of 61 which cover the natural regions of the United States. Each study describes the ecological and/or geological features characteristic of that region, then evaluates sites representative of the various features. Sites which are outstanding examples are suggested as potential National Natural Landmarks. This report describes 91 areas of geologic significance throughout the western portion of the Central Lowlands natural region which extends from the northern border of North Dakota south to the northeastern part of Texas.