Cancañiri Formation

The Cancañiri Formation, also named as Cancañiri Tillite, is a Katian to Hirnantian geologic formation of central Bolivia. The pebbly, argillaceous sandstones, shales and siltstones of the up to 1500 m thick formation, were deposited in a glacial foreshore to deep water turbiditic environment. The formation is named after Cancañiri, a mining town close to Llallagua, where a local legend of a possessed woman is believed. The formation overlies the San Benito Formation in Cochabamba and the Amutara Formation in other parts. The Cancañiri Formation is overlain by the Uncía Formation.

Fossil content
The formation has provided the following fossils:


 * Destombesium pacochicoensis
 * Dinorthis flabellulum
 * Drabovinella curiosa
 * Tunariorthis cardocanalis
 * Oanduporella sp.
 * Rostricellula sp.