167 Dominican Fossils — Maury 



SKETCH OF THE EXPEDITION 



Personnel. — The expedition consisted of the writer, Mr. Karl 

 Paterson Schmidt of the American Museum, and Mr. Axel Olsson, 

 Instructor at Cornell University. Mr. Schmidt and Mr. Olsson 

 had the great advantage of having been trained in geological 

 field work by Professor Gilbert D. Harris, having spent three 

 summers in exploring and collecting on rivers of the Southern 

 States, flowing through Tertiary formations not unlike those 

 which were to be explored in Santo Domingo. 



All the heavy and arduous work of collecting was done by 

 Mr. Schmidt and Mr. Olsson. This involved wading up rivers, 

 carrying heavy packs of fossils, sleeping in the roughest shanties, 

 and undergoing the greatest discomforts, some not unmixed with 

 danger to health and life, but none causing them to falter in the 

 slightest degree. Highest praise and sincerest thanks are offered 

 to Mr. Schmidt and Mr. Olsson for their splendid work in se- 

 curing the fossils and sections upon which the results of this 

 work are based. 



Route. — The expedition left Monte Cristi on May 9th, 1916, af- 

 ter one day's study on the Morro. It was not possible to pro- 

 ceed through Guayubin on the main road, as that town was 

 rebel. So the party crossed the Yaqui River directly south of 

 Monte Cristi on the ferry and went to Las Aguas (see sketch 

 map, I), thence to a region called Macabon (2 on sketch map), 

 which lies in a very flat area. So far the trip had been over the 

 Yaqui flood plain, consisting of alluvial deposits cut by the 

 meandering, abandoned channels of tributary streams. Heavy 

 rain at Macabon caused a delay of twenty-four hours, as the 

 water lay six to^eight inches deep on the flat plain. 



. From Macabon the party proceeded to Las Matas (3 on 

 sketch map). The land here becomes rolling and is strewn with 

 reddish gravels. Riding on to Escalantes (4 on map) Ostrea and 



