21. He is a published geologist who has researched mountain building processes through fieldwork in the French-Italian Alps. 22. The fault occurred in the Caledonian orogeny, during a late stage of this period of mountain building . 23. This low angle moved the focus of melting and mountain building much farther inland than the normal. 24. Either mountain building or upheavals of semi-molten rock inside the earth had periodically made the earth unstable. 25. During the later Miocene Florida was exposed as dry land again due to geologic uplift and mountain building . 26. By the Late Permian, much of the continental plate collision had subsided; the mountain building however, still continued. 27. It was uplifted during the period of mountain building that formed the Appalachians, known as the Appalachian orogeny. 28. Mountain building occurred at this point.29. Some scientists hypothesize that the tectonic processes of plate subduction and mountain building are products of erosion and sedimentation. 30. A number of mountain building periods were involved in the formation of the Central Pangean Mountains, including the orogenies.
