The Foraminifera of the Velasco Shale of the Tampico Embayment

ABSTRACT This paper describes and illustrates the foraminiferal fauna of the Velasco shale which occurs above the Papagallos in the Tampico Embayment region. The species are very numerous and show very interesting relationships with a fauna of similar age in Europe. The series gives considerable data in regard to the conditions of deposition and depth of water that probably accompanied the formation of this thick series of rather uniform shale. In some parts of the formation Foraminifera are very abundant, and the number of species is large.