Thomas Belt, 1832–1878

Biographical note

English geologist and naturalist, born at Newcastle-on-Tyne in 1832, and educated in that city. As a youth Belt became actively interested in natural history through the Tyneside Naturalists Field Club. In 1852 he went to Australia and for about eight years worked at the gold-diggings, where he acquired a practical knowledge of ore deposits. In 1860 he proceeded to Nova Scotia to take charge of some gold-mines, and there met with a serious injury, which led to his return to England.

In 1861 Belt issued a work entitled Mineral Veins: an Enquiry into their Origin, founded on a Study of the Auriferous Quartz Veins of Australia. Later on he was engaged for about three years at Dolgelly, another though small gold-mining region, and here he carefully investigated the rocks and fossils of the Lingula Flags, his observations being published in an important and now classic memoir in the Geological Magazine for 1867.

In the following year he was appointed to take charge of some mines in Nicaragua, where he passed four active and adventurous years the results being given in his The Naturalist in Nicaragua (1874), a widely regarded work. In this volume the author expressed his views on the former presence of glaciers in that country. In this book, he also first described the mutualistic relationship of the ant we now know as Pseudomyrmex spinicola, a species of ants which are found only in Nicaragua and Costa Rica. They live in the thorns of a tropical tree, Acacia collinsii, feeding on nectaries along with the protein and lipid-rich pods produced by the plant for the ants and now known as Belsian bodies (or Beltian bodies) in honor of Belt.

In subsequent papers Belt dealt boldly with the phenomena of the glacial period in Britain and in various parts of the world. After many further expeditions to Russia, Siberia and Colorado, he died in Denver Colorado, on the 21st of September 1878 and was buried there in the Riverside Cemetery.

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