. Bulletin of the Geological Society of America. Geology; Geology -- United States. I Figure 21—Dike number 2. Showing characteristic "manvaise terre" erosion. Professor F. R. Carpenter, of Rapid City, South Dakota, a fellow of this Society, has had the following analysis made by Mr. Barnett, one of his assistants. The analysis is of a piece from dike number 2: Si02 A1203 Fe203 CaO MgO tr. H20 Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these

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. Bulletin of the Geological Society of America. Geology; Geology -- United States. I Figure 21—Dike number 2. Showing characteristic "manvaise terre" erosion. Professor F. R. Carpenter, of Rapid City, South Dakota, a fellow of this Society, has had the following analysis made by Mr. Barnett, one of his assistants. The analysis is of a piece from dike number 2: Si02 A1203 Fe203 CaO MgO tr. H20 Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Geological Society of America. [New York, etc. ] The Society

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