GENERAL AXD ECOXOMIC GEOLOGY 267 



deposits are horizontal beds laid down in a basin of Archean rocks. They 

 consist of beds in the following order from the top : 



Meters 



"1. Canga, or iron conglomerate 



2, Fossilif erous clay shales 5 



o. Sands and clays 22 



4. Bituminous shales ±5 



^-!^-^^^t:- - 



Figure 14. — Ahove-groutid Structure of White Ants 

 View taken seven kilometers west of Queluz, State of Minas Geraes. 



The remarkable cave deposits of Minas Geraes and their Pleistocene 

 fossils have been collected and studied by Peter Lund, a Danish natural- 



