Introduction So little is known of the geology of northeastern Brazil that no apology is needed for the obvious imperfections of the present paper. Most of the notes were taken during a trip along the coast and several trips across the sedimentary beds in 1899, but I was previously somewhat familiar with the geology of the region through my work there while a member of the Geological Survey of the Empire (the Commissão Geologica do Brazil), and from subsequent trips to the interior of Pernambuco. Fortunately I have been able also to obtain valuable contributions from several correspondents whose names are mentioned in the paper to supplement my own observations.
RESULTS OF PREVIOUS AND PRESENT INVESTIGATIONS Aside from the very brief references cited beyond, the only paper ever published on the geology of the state of Parahyba do Norte is that of . . .
- © 1902 Geological Society of America