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Limestone Cut Plain

Ecoregion on Edwards Plateau, Great Plains in TX

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Mesas alternate with broad intervening valleys in the stairstep topography of the Limestone Cut Plain. Ecoregion 29e is underlain by Lower Cretaceous limestones, including the Glen Rose Formation and Walnut Clay, that are older than the limestone of the Edwards Plateau (30). The Glen Rose Formation has alternating layers of limestone, chert, and marl that erode differentially and generally more easily than the Edwards Limestone. The effects of increased precipitation and runoff are also apparent in the increased erosion and dissolution of the limestone layer. The Limestone Cut Plain has flatter topography, lower drainage density, and a more open woodland character than the Balcones Canyonlands (30c). The vegetation of Ecoregion 29e is similar to that of the Balcones Canyonlands, but less diverse: post oak, white shin oak, cedar elm, Texas ash, plateau live oak, and bur oak are prevalent. Although the grasslands of the Limestone Cut Plain are a mix of tall, mid, and short grasses, some consider it a westernmost extension of the tallgrass prairie, which distinguishes this ecoregion from the Edwards Plateau Woodland (30a). Grasses include big bluestem, little bluestem, yellow Indiangrass, silver bluestem, Texas wintergrass, tall dropseed, sideoats grama, and common curlymesquite.

— EPA

Plants

Ashe’s Juniper Juniperus ashei (species), “Ozark White Cedar”, “Mountain Cedar”, “Rock Cedar”, “Post Cedar”, “Ashe Juniper”, “Mexican Juniper”

Limestone Cut Plain

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