WOODWORTH: GEOLOGICAL EXPEDITION TO BRAZIL AND CHILE. 5 
Orville A. Derby. The report herewith submitted is the result of 
that expedition. After the rainy season had begun in Brazil, I 
devoted the time at my disposal to a brief examination of the changes 
of level on the coast of southern Chile. 
Other investigations will be undertaken from time to time as the 
state of the fund may warrant expenditures. 
II. INTRODUCTION. 
In presenting the itinerary of portions of the region traversed, I 
have taken the most convenient way of recording numerous observa- 
tions not pertinent to the main object of the journey. Some of the 
phenomena dealt with in this report have long been described in 
other languages but without much discussion of causes or of geolog- 
ical correlation. On this account I have been led into a free exercise 
of the geologist’s privilege, if not his proper task,— to interpret his 
observations and in the language of Robert Hooke “to raise a 
chronology out of them.”’ The chapter on the Triassic trap plateau 
presents the results of a rapid reconnaissance of a little known 
geological field quite unfamiliar to North American students, and the 
account of the topographic relief of south Brazil is a sketch en route 
embodying observations in a more systematic order than as if left to 
discrete and unrelated paragraphs in an account of scientific travel. 
Through the courtesy of Dr. Orville A. Derby, the recently ap- 
pointed Director of the Mineralogical and Geological Service of 
Brazil it was arranged to conduct the Shaler Memorial party to the 
glacial boulder-beds of Parané. To further facilitate the work of 
the expedition Dr. Euzebio Paulo de Oliveira, Assistant geologist of 
the Service, was detailed by the Director to act as “interpreter, guide, 
and friend.” We were met by Dr. Oliveira on the confines of Parana 
where I found him engaged in making a geological map of the state. 
The generous conduct of this young geologist in placing freely at my 
disposition the results of his observations upon the distribution of 
the strata and in allowing me to examine his collections of rocks and 
fossils makes me much indebted to him for many of the facts presented 
in this report. With him and his pack-train I made the expedition 
across the trap plateau from Rio Negro to Lages and later he made 
with me the excursion up the valley of the Rio Tuberado in Santa 
Catharina. Throughout these journeys the transportation was sup- 
plied by the Brazilian Survey. Without this financial assistance the 
work could not have been carried so far, and without the guidance 
