By Jean-Luc E. Cartron, Gerardo Ceballos, Richard Stephen Felger
This e-book describes the biodiversity and biogeography of nothern Mexico, files the organic value of nearby ecosystems and the affects of human land use at the conservation prestige of crops and flora and fauna. it may turn into the normal resource record for the conservation prestige of species and ecosystems during this zone, that is of bizarre organic curiosity as a result of its excessive biodiversity and hugely diverse panorama and organic zonation.
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Extra info for Biodiversity, Ecosystems, and Conservation in Northern Mexico
2002). The Early Miocene Zoyatal Tuff of Aguascalientes yielded the namesake mammal fauna, which includes perissodactyls and artiodactyls 24 Historical, Geographical, and Legal Setting that belong to extant families, except the extinct Merycoidodontidae (fig. 7, location 16; Dalquest and Mooser 1974; Ferrusquía-Villafranca 1990a, 2003; the site lies near the Central Plateau–Sierra Madre Occidental boundary, within the latter province). Eastern Guanajuato has yielded a large and highly diverse mammal assemblage of latest Miocene–Early Pleistocene age (fig.
The Middle Eocene (Bridgerian) fauna is from Marfil, Guanajuato. It includes rodents related to the ancestral stock of the South American Caviomorpha. The Late Eocene (Chadronian) fauna is from Ojinaga, Chihuahua. It largely consists of rodents and large herbivores; most belong to extinct families worldwide. The Early Miocene (Heminfordian) faunas are from Baja California Norte, Sonora, and Aguascalientes. They chiefly include herbivores that belong to extant modern families. The Late Miocene (Hemphillian) faunas are from Chihuahua, Guanajuato, and Hidalgo.
It is the spacing and other features of the ridges that allow the distinction between the 2 subprovinces. Geologic Aspect The province consists largely of Early Jurassic continental and shallow marine (siliciclastics and evaporates) units and Cretaceous marine carbonate units that change upward to fine clastic, shallow marine to transitional units. The exposed area is much less for the Jurassic than for the Cretaceous. This latter system is dominated in extent and thickness by the Lower Cretaceous (Ortega-Gutiérrez et al.