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Stylized anthropomorphic figures of various types are also common, with a smaller number of canids/felines, snakes, weapons, and a few other identifiable designs.But simple and complex geometric designs are typical (roughly one-third of the total) and are frequently intermingled with the ostensibly identifiable images.More confidently, there is a consensus that the initial immigrants where behaviorally modern, in the archaeological sense of these terms (e.g., [3]).A key attribute of archaeological modernity is the ability to conceptualize and employ symbols, including the capacity to make and use art [4].The CR technique was developed by Dorn and first applied to petroglyphs in the early 1980s [24–27, 29–31, 35–38].Though initially employed in the Americas, it was subsequently used in South America, Africa, Asia, and Australia (discussed below).

Although AMS-WRO dating is in fact currently unusable [33, 34], the controversy strictly had no implications for the other techniques, and significant geomorphological research on them has occurred in the interim.

Comparison of these ages with evidence from other regions in the hemisphere demonstrates substantial artistic and stylistic variation in rock art by the Paleoindian period (circa 10,000–11,000 YBP).

This suggests that, while art may have been part of the baggage of the first immigrants, regional cultural traditions had already been developed by the Terminal Pleistocene, if not earlier.

Figure 1: Mojave Desert, California, rock engravings are predominated by images of bighorn sheep, followed numerically by anthropomorphic figures and next by a variety of geometric forms.

This example is from Sheep Canyon in the Coso Range.

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