Umala Formation

Geology

Members: unnamed (4), Ayo Ayo (1)

Lithologies: not reported (2), sandstone (2), tuff (2)

Paleoenvironments: terrestrial indet. (3), lacustrine - large (2)

Age range: base of the Montehermosan to the top of the Chapadmalalan or 5.00000 to 3.00000 Ma
Collections

Time interval Ma Country or state Original ID and collection number
Montehermosan5.0 - 3.8Bolivia (La Paz) (142381)
Montehermosan - Chapadmalalan5.0 - 3.0Bolivia (Oruro) (70643)
Montehermosan - Chapadmalalan5.0 - 3.0Bolivia (La Paz) (70641 142380)
Piacenzian3.6 - 2.58Bolivia (La Paz) (70653)