Paleobiology

He proposed the term in 1904 so as to initiate "a broad new science" joining "traditional paleontology with the evidence and insights of geology and isotopic chemistry.

[2] Later 20th-century paleobiologists have also figured prominently in finding Archaean and Proterozoic eon microfossils: In 1954, Stanley A. Tyler and Elso S. Barghoorn described 2.1 billion-year-old cyanobacteria and fungi-like microflora at their Gunflint Chert fossil site.

Eleven years later, Barghoorn and J. William Schopf reported finely-preserved Precambrian microflora at their Bitter Springs site of the Amadeus Basin, Central Australia.

[3] In 1993, Schopf discovered O2-producing blue-green bacteria at his 3.5 billion-year-old Apex Chert site in Pilbara Craton, Marble Bar, in the northwestern part of Western Australia.

[4] During the early part of the 21st-century, two paleobiologists Anjali Goswami and Thomas Halliday, studied the evolution of mammaliaforms during the Mesozoic and Cenozoic eras (between 299 million to 12,000 years ago).

Brachiopods and bryozoans in an Ordovician limestone, southern Minnesota