Coal Mines

Description

1. Letter to Nina Nixon-Mendez from Peter D. Warwick regarding Paper on Coal Mining
2. International Journal of Coal Geology, “Petrography, geochemistry, and depositional setting of the San Pedro and Santo Tomas Coal Zones: Anomalous algae-rich coals in the middle part of the Claiborne Group (Eocene) of Webb County, Texas” by Peter D. Warwick, Robert W. Hook, 1995
3. United States Geological Survey, “Reconnaissance in the Rio Grande Coal Fields of Texas” by Thomas Wayland Vaughan, 1900
4. Cover page for “Campfires and Ghost Towns on the Rio Grande: The Archeology and History of the Laredo – Colombia Solidarity International Bridge Site” by Joachim McGraw and Jerry Thompson, March 1997
5. Laredo Morning Times, “A Legacy Preserved: Las Minas remembered with plaque” by Gabriella A. Trevino, December 28, 2014