
Dos bloques metamorficos verdes aproximadamente a 150 metros al norte del Montículo Norte de La Galgada (ver foto cubierta) presentan petroglifos en la parte alta de sus superficies. Ambos bloques están oxidados hacia un marrón casi como cuero, y los diseños son apenas visibles (Fig. 1). Sobre la Roca 2 ellos pueden ser vistos sólo como marcas opacas cuando la superficie pulida de la roca refleja el brillo solar.
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