Columbian Ice Age Rock Art?

Figure 1. Map showing archaeological, rock and palaeontological sites.  La Lindosa is number 13 above. (Iriarte et al, 2022)

Rock paintings are difficult to carbon date.  Rock paintings in the Americas tended to be exposed to the elements and have sustained varying degrees of damage.

  
Identifying Ice Age Megafauna by visual appearance is somewhat controversial, but Iriarte et al (2022) propose that the archeological evidence of humans existing at the same time at the megafauna, the  relative location of site with the correct pigments corresponding to late Pleistocene strata, and the naturalistic appeance being consistant with the fossil record serve as evidence that the animals depicted are indeed Ice Age megafauna.

Equus evolved in North American and dispersed to South American while Hippidion evolved in South America.  The pictured animal has much in common with these precursors to the extant horse.  (Janis and Bernor, 2019) 

Figure 3 from The Evolution of Equid Monodactyly: A Review Including a New Hypothesis (Janis and Bernor, 2019)Original drawing by CMJ, final figure rendered by James G. Napoli.  
Figure 5. (a) Horse painting at La Lindosa. (b) Artistic reconstruction (Mike Keesey). (Iriarte et al, 2022)