Tertiary lignites

Ren, D., Xu, D. and Zhao, F. (2004) A preliminary study on the enrichment mechanism and occurrence of hazardous trace elements in the Tertiary lignite from the Shenbei coalfield, China. International Journal of Coal Geology, 57(3-4), 187-96. 

In simple terms ash partings are relatively abundant in Cretaceous and Tertiary coals of the West and rare in Carboniferous coals of the East. We are less certain of the Gulf Coast Tertiary lignites but they appear to have at least a moderate abundance of... 

Stout SA, Aliphatic and aromatic hydrocarbons in a Tertiary angiospermous lignite, Org Geochem 18 51-66, 1992. 

Amber has been obtained for over 2,000 years from the lignite-bearing Tertiary sandstones on the coast of the Baltic Sea from Gdansk to LiepSija also from Denmark, Sweden and the other Baltic countries. Sicily furnishes a brownish-red amber that is fluorescent. 

During the Tertiary period which dates back approximately 65 million years. Deposits include the sub-bituminous coal and lignite beds in the Great Plains Province, which includes northeastern Wyoming, eastern Montana, western North Dakota, and northwestern North Dakota. 

Lignite was deposited relatively recently ica 2.5-60 x ldh yr ago), mainly during the Tertiary era. L. S. deposiis include those in the Dakotas. Alaska. Montana, and Wyoming. The Miocene period provided the brown coal deposiis that are up to 500 m thick in the Latrobe Valley of Victory in Ausiralia. 

The U.S. has vast coal resources of various geologic age (Carboniferous to Tertiary) and rank (lignite to anthracite). The regions with major coal resources in the conterminous U.S. are divided into six provinces Eastern, Interior, Rocky Mountains, Northern Great Plains, Gulf, and Pacific Coast. In addition, there are Alaskan coal fields (1). Information concerning geographic area, age, rank, reserve base, and sulfur abundance in coals from major basins in these provinces is summarized in Table I. 

Jones, C. M. "Petrology of Lignites from the Wilcox Group (Lower Tertiary) of East and East-Central Texas" Bureau of Economic Geology, University of Texas, Austin, Texas, Open-File Kept., January, 1984. 

Noonan Lignite North Dakota Northern Tertiary Paleocene 6X 10 Yr... 

Cainozoic (or Tertiary) Eocene 60 Dorset ball clays, London clay, Reading beds, Bracklesham Beds. Pebbles, sands, lignite... 

Another maceral of the inertinite group is sclerotinite, which is the result of fungal remains. Sclerotinite occurs as ovoid bodies with cell structure, with reflectance covering the entire inertinite range. Sclerotinite is found mainly in coals of the Tertiary Period, particularly in the lignites, and also in bituminous coals of the Paleozoic era. Sclerotinite (Figure 4.3) is opaque, highly reflective, and, in the oval or round form, may vary in size from 20 to 300 pm (30 to 300 x 10 mm). 

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