The exceptional and somewhat unique occurrence of oil in the metamorphic "basement complex" of the Edison oil field is reviewed. The stratigraphy and structure of the field are outlined briefly with emphasis on broad geologic conditions under which oil has accumulated in the basement rocks. An objective analysis of the oil deposit is attempted and observations as to what constitutes an attractive structure for the accumulation of oil in buried metamorphic rocks are presented. Where possible, illustrations and graphic charts are used to portray objective material and geologic concepts.
Figures & Tables
Structure of Typical American Oil Fields: A Symposium of the Relation of Oil Accumulation to Structure
Modern petroleum geology in the United States had its beginning in the first decade of the 20th Century when the U.S. Geological Survey began mapping the structure of the rocks in and near old fields in order to discover the various types of structural conditions under which oil and gas are trapped. Structural geology has evolved as a branch of the broader science far more rapidly than have methods of mapping the attitude of rocks at the surface. This volume, published in the late 1920s, was designed to afford authoritative and modern descriptions of the structure of typical oil fields in the United States. Each of the 39 fields contained here is described by an author who is intimately familiar with the available data. The relationship of structure at the surface and at depth for different terranes is clearly set forth wherever the strata are not parallel. The volume concludes with a summary paper on the role of geologic structure in the accumulation of petroleum. Fields include: Florence, Colorado; Stephens, Arkansas; Kevin-Sunburst, Montana; Bradford Pennsylvania; and Salt Creek, Wyoming.