Quaternary Stratigraphy of the La Playa Archaeological Site (SON F:10:3), Northern Sonora, Mexico - Reconstructing Human-Landscape Interactions: Interpreting Desert and Fluvial Environments - page 11

Fig. 6 Photographs of the
paleosol. a Here the paleosol
is overlain by a thin interval
of the reworked silt.
b Exposure of the paleosol in
the channel of the Rio
Boquillas. Beneath the
interval of sandy paleosol are
Pleistocene gravels and
cobbles
Fig. 7 Photograph of the
Pleistocene cobbles,
cemented with red,
coarse-grained sands