SciELO - Scientific Electronic Library Online

vol.66 issue3The Gran Tesoro and Nazas formations: evolution of Upper Triassic-Lower Jurassic sequences in Mexico and their tectonogenetic meaningSubsurface fire and subsidence at Valle del Potosí (Nuevo León, Mexico): Preliminary observations author indexsubject indexsearch form
Home Pagealphabetic serial listing  

Services on Demand




Related links

  • Have no similar articlesSimilars in SciELO


Boletín de la Sociedad Geológica Mexicana

Print version ISSN 1405-3322


CZAJA, Alexander et al. Inland dunes fauna and flora from Paleolake Irritila in the Comarca Lagunera, Coahuila, northern Mexico. Bol. Soc. Geol. Mex [online]. 2014, vol.66, n.3, pp.541-551. ISSN 1405-3322.

For over a decade the Chihuahuan Desert has been considered as a hotspot of biodiversity. The diverse aquatic ecosystems, especially, are (and were) rich in mollusk species. The dunes of the Comarca Lagunera, Coahuila, Mexico, are of major importance due to the well-preserved remains of animals and plants in a paleolake that covered a vast area in the region. This paper is the first report of the paleolimnological investigations of the Paleolake Irritila ecosystems in northern Mexico. We determined more than 28 species of gastropods, bivalves, ostracods, algae and one aquatic plant. The dunes contain one of the richest and most diverse fauna of the late Quaternary of northern Mexico. The fossils indicate a permanent but shallow lake with moderate salinity and alkalinity (pH) higher than 8.5, most likely around 10. Most of the mollusks are distributed outside Mexico and restricted to northern latitudes (northern United States and Canada). Several of them are endemic to the southern United States (Florida, Nevada, and Texas). For the first time in North America, using the local fauna and flora preserved in dune sediments, we try to reconstruct the paleoenvironmental conditions in northern Mexico during the late Quaternary.

Keywords : Paleolake; inland dunes; Pleistocene mollusk fauna; northern Mexico.

        · abstract in Spanish     · text in English


Creative Commons License All the contents of this journal, except where otherwise noted, is licensed under a Creative Commons Attribution License