Can radiometric dating be used on sedimentary rocks
In 1834 a partial skeleton was found near Brighton that corresponded with Mantell’s fragments from Tilgate Forest.
It became known as the , which he named from an incomplete skeleton composed of very large bones.
Both men collected fossils as an avocation and are credited with the earliest published announcements in England of what later would be recognized as dinosaurs.
In both cases their finds were too fragmentary to permit a clear image of either animal.
Even earlier (1800), large birdlike footprints had been noticed on sandstone slabs in Massachusetts.
Pliny Moody, who discovered these tracks, attributed them to “Noah’s raven,” and Edward Hitchcock of Amherst College, who began collecting them in 1835, considered them to be those of some giant extinct bird.
The tracks are now recognized as having been made by several different kinds of dinosaurs, and such tracks are still commonplace in the Connecticut River valley today.
In their intense quest to find and name new dinosaurs, these scientific pioneers became fierce and unfriendly rivals.In 1676 Robert Plot of the University of Oxford included, in a work of natural history, a drawing of what was apparently the knee-end of the thighbone of a dinosaur, which he thought might have come from an elephant taken to Britain in Roman times.Fossil bones of what were undoubtedly dinosaurs were discovered in New Jersey in the late 1700s and were probably discussed at the meetings of the American Philosophical Society in Philadelphia.This uncertainty persisted for a century thereafter, but it is now understood that the two groups share unique features that indeed make the Dinosauria a natural group.were accidentally uncovered in a coal mine during the course of mining operations.
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In addition, bones have sometimes been misidentified as dinosaurian when they are not from dinosaurs at all.