To research her doctoral thesis, Basse left for the island of Madagascar as project manager for the Museum of Natural History and was attached to the local mining service. She continued her research there in an area approximately bounded by Sikili, Mangoky River, and Ménamaty, which is the area where the town of Ankazoabo is located today in the southwestern part of the island. She traveled in these regions alone with Bara porters, a Malagasy surveyor and a Hetsiléo cook. After returning to Paris, she defended her thesis in 1935 about plant groups in southwestern Madagascar, earning her Ph.D. She was named a Fellow of the National Science Fund and appointed lecturer at CNRS before becoming research director. Based in Paris, she collaborated on the geological map of Luxembourg and then that of France. She was also responsible for paleontological missions in the Central Atlas mountains of Tunisia and several other geological missions. She became associate assistant to the geological map of France, and in the 1960's held the post of director of the prehistoric antiquities in the district known as "Paris-Nord". Author Anick Coudart wrote, "As such, she was the first woman in France entrusted with the administration of archaeological excavations".
Associations
She was made an honorary member of the Palaeontological Society of India in 1956. Basse was elected a corresponding member of the fourth section of the Academy of Overseas Sciences on 7 December 1957, and became a full member on 17 May 1968.
Death
Basse died in 1985 in Clamart, France. In her obituary, published in the Paris newspaper Le Figaro, 31 January 1985, she is remembered as the "Countesse de la Goublaye de Ménorval" a title she acquired with her marriage.
General government of Madagascar and dependencies. Department of Mines. Paleontological monograph of the Cretaceous of the province of Maintirano, Madagascar. Antananarivo: Official printing house, 1931
Theses presented to the Faculty of Sciences of Paris to obtain the degree of doctor of natural sciences. Plant groups of South-West Madagascar... Paris: Masson, 1934
Macrocephalitides from southwestern Madagascar: macrocephalitidae, eucycloceratidae, mayaitidae. Crops from the É mission. Basse, 1930-31. Paris: , 1951
Notes of the excursion. Quaternaire Année 1964 1-1 pp. 16-17, 1964.
Fossils: evolution of the structures of living matter. Paris: University Press of France, 1968