Gretchen Hoffman
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Presentations
- Roybal, G.H., and Campbell, F.W., May 1984, Coal Geology of the Salt Lake coal field, west-central New Mexico, American Assoc. of Petroleum Geologists, National Convention, San Antonio, Texas, vol. 68, no. 4.p 523.
- Roybal, G.H., and Barker, J.M., October 1985, Geology and production of humate and weathered coal in New Mexico, SME-AIME Fall Meeting, Albuquerque, New Mexico - Abstract and preprint no. 85-408.
- Roybal, G.H., and Campbell, F.W., April 1986, Quality assessment of strippable coals in New Mexico, New Mexico Geological Society Spring Meeting, Socorro, New Mexico, Abs. with Programs; New Mexico Geology, v. 8, no. 3, p. 67.
- Roybal, G.H., September 1986, Characterization of New Mexico coals, Abs. American Assoc. of Petroleum Geologists, Rocky Mountain Section Meeting, Casper, Wyoming, vol. 70, no. 8, p. 1053.
- Roybal, G.H., and Beaumont, E.C., November 1988, Coal quality variations in the Fruitland Formation, New Mexico (abs.): Geological Society of America, national meeting, Abstract with Programs, vol. 20 no 7, p. A89.
- Beaumont, E.C., and Roybal, G.H., October 1989, Potential for economic coal development in the upper coal member of the Menefee Formation, Torreon wash area, Sandoval County, New Mexico: Abs., American Assoc. of Petroleum Geologists, Rocky Mountain Section Meeting, Albuquerque, New Mexico, vol. 73 no 9, p. 1147.
- Hoffman, G.K., April 1990, Recent investigation of the Menefee coals, Monero coal field, Rio Arriba County, New Mexico (abs.): New Mexico Geological Society Spring Meeting, Socorro, New Mexico.
- Hoffman, G.K., April 1992, Coal characteristics of the upper and Cleary Coal Members of the Cretaceous Menefee Formation in the La Ventana-Chacra Mesa Fields, southeastern San Juan Basin (abs.): New Mexico Geological Society Spring Meeting, Socorro, New Mexico, New Mexico Geology v. 14, p. 64-65.
- Hoffman, G.K., February 1993, Coal quality characteristics of the Fruitland and Menefee Formations in the San Juan Basin, northwest New Mexico: Four Corners Geological Society Meeting, Durango Colorado, Four Corners Geological Society newsletter.
- Hoffman, G.K., April 1993, Coal quality trends of the Fruitland and Menefee Formations in the San Juan Basin, Northwest New Mexico: (Abs) New Mexico Geological Society Spring Meeting, Socorro, New Mexico, proceedings volume, p. 30.
- Hoffman, G.K., Verploegh, J., Barker, J.M., February 1994, Geology and chemistry of humate deposits in the southern San Juan Basin, New Mexico: (ABS) SME Annual Meeting and Exhibit Pocket Program, Albuquerque, New Mexico, p. 104, pre-print 94-102, 10 p.
- Hoffman, G.K., Barker, J.M., and Austin, G.S., May 1994, Overview of humate production in North America: in proceedings, 30th Forum on the Geology of Industrial Minerals, Halifax, Nova Scotia.
- Hoffman, G.K., April 1995, Natural Clinker— The red dog of aggregates in the Southwest: in proceedings 31st Forum on the Geology of Industrial Minerals, El Paso, Texas.
- Hoffman, G.K., April 1997, Updated Demonstrated Reserve Base, San Juan Basin, NM, American Assoc. of Petroleum Geologists National Convention, Dallas, TX.
- Hoffman, G.K., and Jones, G.E., 1998, Fruitland Coal Availability Study, Bisti Field, San Juan Basin New Mexico— A Preliminary Report: New Mexico Geological Society Annual Spring Meeting, Socorro, NM, New Mexico Geology vol. 20, no. 2, p. 50.
- Hoffman, G.K., 1999, New Mexico’s Coal Industry: New Mexico Geological Society Annual Spring Meeting, Socorro, NM, New Mexico Geology vol. 21, no. 2, p. 31.
- Hoffman, G.K., and Jones, G. E., February 2000, Coal Availability Studies, Fruitland and Menefee Formations, San Juan Basin, New Mexico: (Abs) SME Annual Meeting and Exhibit Pocket Program, Salt Lake City, Utah, p. 82, pre-print 00-79, 12 p.
- Hoffman, G.K., May 2000, Fly Ash Utilization in the Western United State: (Abs) 36th Forum on the Geology of Industrial Minerals and 11th Extractive Industry Geology Conference, Bath, England, Programme and Abstracts.
- Hoffman, G.K., September 2000, Uses of Fly Ash from New Mexico Coals: American Assoc. of Petroleum Geologists Rocky Mountain Section meeting, Albuquerque, NM Abstracts in American Assoc. of Petroleum Geologists Bulletin vol. 84, no. 8., p. 1240.
- Hoffman, G.K., April, 2002, Fly Ash Utilization in the Western United States,: Coal Combustion By-products and Western coal Mines: A Technical Interactive Forum, Denver, Colorado, Abstracts.
- Krueger, C. B.; McLemore, V. T.; Hoffman, G. K.; Jones, G. R.; Wilks, M., 2002, Mining district databases of New Mexico [abs.], in: Geological Society America, Abstracts with Programs, v. 34, no. 6, 448 p.
- Krueger, Christian B.; McLemore, Virginia T.; Hoffman, Gretchen K.; Jones, Glen R.; Wilks, Maureen, 2002, Mining districts databases of New Mexico, in: Geological Society America, Abstracts with Programs, v. 34, 448 p.
- McLemore, V. T., Raugust, J. S., Hoffman, G. K , Wilks, M., Johnson, P., Krueger, C. B., and Jones, G. E., 2003, Use of the New Mexico Mines Database in reclamation studies: 20th Annual National Meetings of ASMR and the 9th Billings Land Reclamation Symposium, Working Together for Innovative Reclamation
- McLemore, V. T., Krueger, C. B., Johnson, P., Raugust, J. S., Jones, G. E., Hoffman, G. K. and Wilks, M., 2003, New Mexico Mines Database (abstr.): Society of Mining, Exploration, and Metallurgy, SME program, p. 58.
- Hoffman, G.K., and Brister, B.S., November, 2004, History Of Development Of Coal And Coalbed Methane Resources Of The Raton Coalfield In New Mexico: Geological Society of America Annual Mtg.
- Brister, B.S., and Hoffman, G.K., April, 2005 New Mexico’s Raton Basin Coalbed Methane Play: American Association of Petroleum Geologists, Southwest Section Meeting, Fredericksburg, Texas.
- Hoffman, G.K., March 2006, Construction Uses: Pozzolans and Other Supplementary Cementitious Materials (SCMs), SME Annual Meeting, St. Louis Missouri.
- Johnson, Peggy S., Timmons, Stacy, Whiteis, Jennifer, Gillard, Lewis, Hoffman, Gretchen, 2006, Preliminary Results Of Geochemical Characterization Of Groundwater In McKinney, ed., The Southern Española Basin, New Mexico: In Geologic and hydrogeologic Framework of the Espanola Basin – Proceedings of the 5th Annual Espanola Basin Workshop, Santa Fe, New Mexico, March 7-8, 2006, U.S. Geological Survey Open-file report 2006-1134.
- Hoffman, G., May 2007, Environmental and economic factors influencing use of mineral admixtures in concrete over the last 25 years: Proceedings of the 43rd Forum on the Geology of Industrial Minerals 2007.
- Harben, P., Austin, G., Hoffman, G., McLemore, V., Caledon, M., and Barker, J., May 2007, Industrial minerals, a staple in the economy of the Land of Enchantment: Proceedings of the 43rd Forum on the Geology of Industrial Minerals 2007.
- Hoffman, G.K., March 2009, Factors Influencing use of Mineral Admixtures for the past decade in the Western US, SME Annual Meeting, Denver, CO, preprint 09-081.
- Hoffman, Gretchen K.; Wilks, Maureen, 2013, Acquiring and georeferencing coal mine maps: San Juan Basin, NM, in: 2013 New Mexico Geological Society,Spring Meeting, April 12, 2013, Macey Center, New Mexico Tech, Socorro, NM, New Mexico Geology, v. 35, no. 2, pp. 51.