ABSTRACT
Certain Jurassic formations of Mexico are defined and their probable correlation and origin discussed. Marine Lower Jurassic (Lias) rocks cropping out in the mountains of northern and central Veracruz, eastern Hidalgo, and northern Puebla are named the Huayacocotla formation. The overlying redbeds are named the Huizachal formation and are compared with the Upper Jurassic Eagle Mills formation of the southern United States. Evidence of general erosion and local strong folding of the Huizachal formation prior to upper Oxfordian time suggests that similar events may have occurred elsewhere in the Gulf region and may have had a bearing on the origin of Upper Jurassic salt in southern Mexico.
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