TENDAGURU SERIES 



265 



the southern part of German East Africa was led by Dr. Werner Janensch, 

 assisted by Doctors Hennig, Von Staff, and Reck, during the years 1909- 

 1912. During this time in the dry season they always employed from 150 

 to 500 natives, whose wages averaged about twelve cents a day. The 

 shipments to Berlin totalled 1,050 cases, weighing about 250 tons, the 

 whole costing about $58,000. No complete single skeleton Avas found, 

 though the museum hopes to mount from four to five great sauropods, one 

 or more small ornithopods, and one armored predentate. Of large skulls, 

 they have found three fairly complete ones and the back parts of eight 

 more, and of small skulls there are six. Of marine invertebrate fossils 

 there is a great and varied quantity, and most of these are carefully col- 

 lected as to horizons. 



GESERAL 8TRATIG llAPH Y 



Branca-' tells us that 



"even now we have uttaiued the important conclusion that tlie dinosaurs of 

 German East Africa belong to the Upper Jurassic and the Lower Cretaceous, 

 and accordingly these animals lived not later than those [of the Morrison] of 

 North America." The invertebrate and fish faunas interbedded with the 

 dinosaur zones establish the conclusion "that the saurian beds are not actually 

 continental deposits . . . but are also deposits of waters of a nearby 

 shore ; but laid down under especial conditions that can be determined, at least 

 to a certain degree, from the inherent character of the formation." 



For easy reference the writer will insert here a table of the succession 

 as determined in the area about Tendaguru : 



MiJcindani fluviatile sands and conglomerates. 

 Great break in section. 



Lower 

 Cretaceous i 



Neocomian . 



Makonde unfossiliferous series, 617 feet thick. 

 To the north has marine Urgonian and 



Aptian fossils. 

 Probable break in sedimentation. 

 Tendaguru series, 400 feet. 



fMarine Trigonia schwarzi sandstones, 16 



feet. 

 Upper or main dinosaur limy-sandy clay, 

 130 feet. 

 Dinosaurs, Morrison-like. 



-'7 Op. cit., part i, p. 68. 



XXI — Bull. Geol. Soc. Am., Vol. 29, 1917 



