The San Miguel Lignite deposit, Jackson Group (Eocene), South Texas. (In: Tertiary Coals in South Texas: Anomalous Cannel-Like Coals of Webb County (Claiborne Group, Eocene) and Lignites of Atascosa County (Jackson Group, Eocene) - Geologic Setting, Character, Source-rock and Coal-bed Methane Potential. P.D.Warwick, C.E.Aubourg, and J.C.Willett,editors)
Reference:
Warwick,P.D. et al. (1999)
The San Miguel Lignite deposit, Jackson Group (Eocene), South Texas. (In: Tertiary Coals in South Texas: Anomalous Cannel-Like Coals of Webb County (Claiborne Group, Eocene) and Lignites of Atascosa County (Jackson Group, Eocene) - Geologic Setting, Character, Source-rock and Coal-bed Methane Potential. P.D.Warwick, C.E.Aubourg, and J.C.Willett,editors) United States Geological Survey, Open-File Report
Vol. 99 # 301 P. 23- 36