Fly Gap, near Pontotoc, Texas

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Map of Texas showing the location of the Fly Gap division

This ranch is in the central Texas mineral region (Llano Uplift). The soil is sandy, with large outcrops of metamorphic Valley Springs gneiss (a feldspar-quartz-biotite gneiss of Precambrian age, with minor amounts of schist, amphibolite, and marble, and veins of pegmatite intrusions), and outcrops of Cambrian-age Hickory sandstone along ridge tops. The vegetation is oak savannah, with live oaks, post oaks, blackjack oaks, and Texas red oaks. The wildflowers are spectacular in the spring and early summer.

Fly Gap Divison of Double Helix Ranch, near Pontotoc, Texas (May, 2007). This is almost exactly the geographic center of Texas.

Lampropeltis triangulum (Milksnake)

Fly Gap has a great diversity of plants, animals, lichens, and other groups of organisms. To see preliminary lists of species for some of these groups, see the lists to the right.

Click here for a discussion of the rainfall patterns in central Texas, especially as they relate to the El Niño Southern Oscillation and global warming.

Species lists:

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