Add to ORKGFrom introduction: In 1978 the U.S. Geological Survey began a 4-year study of aquifers in the northern Great Plains. The purpose of this map, which is a product of that study, is to show the total thickness of the Lakota Formation and equivalent rocks
Introduction: In 1978, the U.S. Geological Survey began a 4-year study of aquifers in the northern G...
Introduction: In 1978 the U.S. Geological Survey began a 4-year study of aquifers in the northern Gr...
From introduction: "The U.S. Geological Survey began a 5-year study of the High Plains regional aqui...
Introduction: In 1978 the U.S. Geological Survey began a 4-year study of aquifers in the northern Gr...
Introduction: In 1978 the U.S. Geological Survey began a 4-year study of aquifers in the northern Gr...
From introduction: In 1978 the U.S. Geological Survey began a 4-year study of aquifers in the northe...
From introduction: In 1978 the U.S. Geological Survey began a 4-year study of aquifers in the northe...
From introduction: In 1978 the U.S. Geological Survey began a 4-year study of aquifers in the northe...
From introduction: In 1978 the U.S. Geological Survey began a 4-year study of aquifers in the northe...
From introduction: In 1978 the U.S. Geological Survey began a 4-year study of aquifer in the norther...
From introduction: In 1978 the U.S. Geological Survey began a 4-year study of aquifers in the northe...
From introduction: In 1978 the U.S. Geological Survey began a 4-year study of aquifers in the northe...
From introduction: In 1978 the U.S. Geological Survey began a 4-year study of aquifer in the norther...
From introduction: In 1978 the U.S. Geological Survey began a 4-year study of aquifers in the northe...
Introduction: In 1978 the U.S. Geological Survey began a 4-year study of aquifers in the northern Gr...
Introduction: In 1978, the U.S. Geological Survey began a 4-year study of aquifers in the northern G...
Introduction: In 1978 the U.S. Geological Survey began a 4-year study of aquifers in the northern Gr...
From introduction: "The U.S. Geological Survey began a 5-year study of the High Plains regional aqui...
Introduction: In 1978 the U.S. Geological Survey began a 4-year study of aquifers in the northern Gr...
Introduction: In 1978 the U.S. Geological Survey began a 4-year study of aquifers in the northern Gr...
From introduction: In 1978 the U.S. Geological Survey began a 4-year study of aquifers in the northe...
From introduction: In 1978 the U.S. Geological Survey began a 4-year study of aquifers in the northe...
From introduction: In 1978 the U.S. Geological Survey began a 4-year study of aquifers in the northe...
From introduction: In 1978 the U.S. Geological Survey began a 4-year study of aquifers in the northe...
From introduction: In 1978 the U.S. Geological Survey began a 4-year study of aquifer in the norther...
From introduction: In 1978 the U.S. Geological Survey began a 4-year study of aquifers in the northe...
From introduction: In 1978 the U.S. Geological Survey began a 4-year study of aquifers in the northe...
From introduction: In 1978 the U.S. Geological Survey began a 4-year study of aquifer in the norther...
From introduction: In 1978 the U.S. Geological Survey began a 4-year study of aquifers in the northe...
Introduction: In 1978 the U.S. Geological Survey began a 4-year study of aquifers in the northern Gr...
Introduction: In 1978, the U.S. Geological Survey began a 4-year study of aquifers in the northern G...
Introduction: In 1978 the U.S. Geological Survey began a 4-year study of aquifers in the northern Gr...
From introduction: "The U.S. Geological Survey began a 5-year study of the High Plains regional aqui...