A Petroglyph is an image recorded on stone, usually by prehistoric peoples, by means of carving, pecking or otherwise incised on natural rock surfaces. They are commonly associated with Neolithic people, and were a dominant form or pre-writing symbols used in communication from approximately 10,000 B.C. to 5,000 B.C. The word comes from the Greek words petros meaning "stone" and glyphein meaning "to carve" (it was originally coined in French as pé´²oglyphe). These images may have had deep cultural and religious significance for the societies that created them.
The term 'petroglyph' should not be confused with either the term "pictograph" - a more advanced symbol type, which uses the images to tells the chronological story spanning through time - nor with cave painting. The difference between cave painting and petroglyphs is twofold: first, petroglyphs are carved or engraved, while cave paintings refer to the images painted on stone. Second, petroglyphs are more evolved symbols compared to the cave paintings, showing specific events more clearly.
'We were freaking out': Scientists left 'flabbergasted' by detailed dinosaur footprints covering a cliff in Alaska
"Flabbergasted" researchers have discovered that the face of a 20-story cliff in Alaska is covered in the fossilized footprints of dozens of dinosaurs, giving the impression that the creatures defied gravity to walk across its surface, though a geological process is actually to blame.
About 65.5 million years ago, the last of the non-avian dinosaurs were wiped out in the fallout from one of the earth's most catastrophic extinction events. They left only bones and traces in the rock behind. Yet there are people who claim that humans actually lived alongside dinosaurs. Young earth creationists have a habit of twisting natural history to fit within the narrow confines of their interpretation of Genesis, and they insist that humans once co-existed with sauropods, tyrannosaurs, ceratopsians and other dinosaurs within the last 6,000 years or so.​
https://www.smithsonianmag.com/science-nature/debunking-the-dinosaurs-of-kachina-bridge-96018102/