Johann Heinrich Conrad Gottfried Gustav Steinmann (9 April 1856 – 7 October 1929) was a German geologist and paleontologist.
He made contributions to the Theory of Evolution and to the study of the structural geology and orogeny of the Andes.
The recognition of Steinmann's Trinity served years later to build up the theory around seafloor spreading and plate tectonics.
[5] In Peru Steinmann studied the geology of Cerro de Pasco[2] and of the Marañón fold and thrust belt[6] among other things.
In a work published posthumously by his students in 1929 Steinmann defined the main phases of the Andean orogeny in Peru.