And once again, you are believing a lie. With fake evidence.
Want to know what that rock really looks like? Because that is not it.
And chemical and structural analysis has shown that what you are seeing is a petroglyph of a snake, partially on top of an older one, with some chemical contaminants. Just like the last "proof" you provided, this is fake and a lie because the "original" does not look like the image you are trying to show us.
In fact, the person that "discovered" it also does not believe it is of a dinosaur. It was discovered in 2006 by Phil Senter, from Fayetteville State University. He passed it along to Sally Cole, a Petroglyph Archaeologist with the Natural History Museum of Utah. Who examined it in more detail (including under various forms of light and microscopically) and came to that conclusion.
Notice once again, real scientists who work for real legitimate institutions. Who then release real and original photographs, not faked up ones that claim they are original. When somebody uses an obviously faked and doctored photograph and claims it is "original", the entire report should be dismissed. If they are lying about the photograph, odds are that the entire article is a lie.