Michalzik, Dieter; Fischer, Rudolf; Hernandez, Delfino; Oezen, Deniz
(Hannover : Universität Hannover. Institut für Geologie und Paläontologie, 2001)
A great variety of color banded CaC03 is known as „Mexican Onyx“, and is extensively used for ornamental purposes. Within the San Antonio Texcala mining district an area of about 24.000 m2 is covered by a thick travertine ...