LettersDiscussion and Correspondence THE GRAND GULF FORMATION By WM. H. DALL See allHide authors and affiliations Science 12 Dec 1902:Vol. 16, Issue 415, pp. 946-947DOI: 10.1126/science.16.415.946 WM. H. DALLFind this author on Google Scholar Find this author on PubMed Search for this author on this site Article Info & Metrics eLetters PDF This is a PDF-only article. The first page of the PDF of this article appears above.