BUILDING AND ORNAMENTAL STONES. 613 



Rhyolite tuff. Reddish ; coarse aud friable. State of Zacatecas. Mexican Geo- 

 graphical Exploring Commission, 18b5. 37756. 



Fine ; light gray. State of Zacatecas. Mexican Geographical Exploring Com- 



mission, 1885. 37757. 



Fine ; light fawn colored. State of Zacatecas. Mexican Geographical Ex- 



ploring Commission, 1885. 37717. 



Fine ; nearly white. State of Hidalgo. Mexican Geographical Exploring Com- 



mission, 1885. 37810. 



Coarse; light colored ; soft and friable. State of Hidalgo. Mexican Geograph- 



ical Exploring Commission, 1885. 37740. 



Light colored ; soft and friable. State of Hidalgo. Mexican Geographical 



Exploring Commission, 1885. 37742. 



Fine; light pinkish. State of Zacatecas. Mexican Geographical Exploring 



Commission, 1885. 37775. 



Fine; pinkish. State of Zacatecas. Mexican Geographical Exploring Com- 



mission, 1885. 37776. 



Coarse, light pinkish. State of Zacatecas. Mexican Geographical Exploring 



Commission, 18S5. 3778. 



Fine ; light lavender. State of Zacatecas. Mexican Geographical Exploring 



Commission, 1885. 37779. 



Fine ; light greenish gray. State of Zacatecas. Mexican Geographical Ex- 



ploring Commission, 1885. 37784. 



Light pinkish. State of Zacatecas. Mexican Geographical Exploring Com- 



mission, 1875. 37737. 



Very light gray. State of Zacatecas. Mexican Geographical Exploring Com- 



mission, 1885. 37731. 



Fine ; light reddish. State of Zacatecas. Mexican Geographical Exploring 



Commission, 1885. 37733. 



Compact ; light green. State of Oaxaca. Mexican Geographical Exploring 



Commission, 1885. 37747. 



Compact ; light green. State of Oaxaca. Mexican Geographical Exploring 



Commission, 1885, 37750. 



Coarse; light green. Zumpango, State of Mexico. Mexican Geographical Ex- 



ploring Commission, 1885. 37725. 



Fine; very light colored; soft and friable. State of Oaxaca. Mexican Geo- 



graphical Exploring Commission, 1885. 37749. 



Coarsely vesicular ; yellowish. Mexican Geographical Exploring Commission, 



1885. 37714. 



Fine ; nearly white, streaked with red and yellow. Mexican Geographical 



Exploring Commission, 1885. 37736. 



Rhyolite (?) tuff. Coarse; red. Huelmetoca. Mexican Geographical Exploring 

 Commission 1885. 37691. 



Rhyolite. Brownish. State of Zacatecas. Mexican Geographical Exploring Com- 

 mission, 1885. 37994. 



Compact; light reddish. State of Zacatecas. Mexican Geographical Explor- 



ing Commission, 1885. 37730. 



Biownish gray. Stato of Zacatecas. Mexican Geographical Exploring Com- 



mission, 1885. 37758. 



Fine; pinkish. State of Zacatecas. Mexican Geographical Exploring Com- 



miasion, 1885. 37744. 



