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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): 32.8969444444, -97.0380555556

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

Mineral List

2 valid minerals.

Regional Geology

This 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 data will improve over time as more accurate maps and data sets are added.

Cretaceous66 - 145 MaCretaceous sedimentary rocks

Sedimentary rocks

Late Cretaceous66 - 100.5 MaEagle Ford Formation

Major:: {shale},Minor:: {siltstone},Incidental:: {limestone}

Eagle Ford Formation

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.

Campanian - Cenomanian72.1 - 100.5 MaLate Cretaceous sedimentary


Austin, Eagle Ford, Woodbine, and Tuscaloosa Groups

References for regional geology:

Data provided by

Garrity, C.P., and Soller, D.R.,. Database of the Geologic Map of North America: adapted from the map by J.C. Reed, Jr. and others (2005). U.S. Geological Survey Data Series 424 .

USGS compilers. State geologic map data. State Maps.

Geological Survey of Canada. Generalized geological map of the world and linked databases. doi:10.4095/195142. Open File 2915d.

The above list contains all mineral locality references listed on This does not claim to be a complete list. If you know of more minerals from this site, please register so you can add to our database. This locality information is for reference purposes only. You should never attempt to visit any sites listed in without first ensuring that you have the permission of the land and/or mineral rights holders for access and that you are aware of all safety precautions necessary.
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