Captain Marshall Field Expeditions

In addition to his regular annuity of $100,000, in 1927 Captain Marshall Field provided $40,000 to defray the expenses of the Brazilian Expedition under the leadership of Mr. George K. Cherrie.

While prospecting in the Cenozoic, brief forays into Mesozoic deposits in the San Bernardo Hills of Catamarca Province in Argentina unearthed three leg bones of enormous sauropods identified as Antarctosaurus and Argyrosaurus.

This time his field crew included Rudolf Stahlecker, Robert C. Thorne, Jose Strucco, Luis Flores, Felipe Mendez, and Colin Campbell.

He and his team discovered over 500 fossil vertebrates including seven new species such as the saber-toothed marsupial, Thylacosmilus atrox and flightless terror bird, Andalgalornis ferox.

These focussed on ancient pottery from Trujillo, textiles of the early Nazca period and an osteological study of Nasca trophy heads collected by A.L.

P 13352, Argyrosaurus femur found by C. Harold Riggs , son of expedition leader Elmer Riggs in the San Bernardo Hills of Argentina, February, 1924. Field Museum Photo Archives neg. CSGEO48941
Rudolf Stahlecker collecting P 14503, Pronothrotherium skeleton from Corral Quemado in Catamarca Province , Argentina in 1926. Field Museum Photo Archives negative CSGEO69381