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Dallas-Fort Worth Airport (DFW Airport), Dallas Co., Texas, USA

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Latitude & Longitude (WGS84): 32° 53' 49'' North , 97° 2' 17'' West
Latitude & Longitude (decimal): 32.89694,-97.03806
Köppen climate type:Cfa : Humid subtropical climate


Specimens found during construction in the 1970s. The airport includes parts of Dallas and Tarrant counties.


Mineral List


2 valid minerals.

Regional Geology

This geological map and associated information on rock units at or nearby to the coordinates given for this locality is based on relatively small scale geological maps provided by various national Geological Surveys. This does not necessarily represent the complete geology at this locality but it gives a background for the region in which it is found.

Click on geological units on the map for more information. Click here to view full-screen map on Macrostrat.org

Late Cretaceous
66 - 100.5 Ma



ID: 2829740
Eagle Ford Formation

Age: Late Cretaceous (66 - 100.5 Ma)

Stratigraphic Name: Eagle Ford Formation

Comments: In North, central, and south Texas including Quaternary for all of west Texas- Shale, siltstone, and limestone; upper part limest. and shale, ls lt-yellowish-brown, flaggy; lower part, siltst. and v. fine-grained sandst., lt-yellow to gray, laminated flaggy, some limestone, silty, med-brown, laminated, thickness 75-200 ft, thins NEward. In East Texas and Gulf Coast to Rio Grande- Shale and limestone. Upper part-- shale, compact, silty, contains fossil fish teeth and bones, 10 ft or more thick; middle part-- silty limest grading to calcar siltst, med gray weathers pale yellowish-brown, flaggy; lower part--shale, calcareous, dk gray, 7-50 ft thick. Thickness of Eagle Ford Formation 25-65 ft. In Texarkana Sheet (1966) thickness 60 ft feathers out east. In Sherman Sheet (1967) (NE Texas) shale, selenitic, bituminous, calcar concretions and septaria, thin platy beds of sandst. and sandy ls. in middle and upper part, med to dk gray; marine megafossils; thickness 300-400 ft.

Lithology: Major:{black shale,siltstone}, Incidental:{limestone}

Reference: Horton, J.D., C.A. San Juan, and D.B. Stoeser. The State Geologic Map Compilation (SGMC) geodatabase of the conterminous United States. doi: 10.3133/ds1052. U.S. Geological Survey Data Series 1052. [133]

Data and map coding provided by Macrostrat.org, used under Creative Commons Attribution 4.0 License



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