Sinkhole risk in Crosby County, TX: Mostly deep or small

Mostly deep or small

Some soluble rock, mostly deeply buried or in a small share of the county.

On soluble rock: 14%
At or near the surface: 14%
Buried under cover: 0%

The next step for one property

Sinkholes are uncommon here; watch for new depressions after heavy rain or leaking pipes.

That works out to roughly 125 of Crosby County's 900 square miles on soluble rock, 125 of them with the rock at or near the surface. With about 5,030 residents (6 per square mile), much of the land is open, and the mapped rock may sit far from where people actually live. The figures come from 396 map points about 1.5 miles apart, so a pocket smaller than that can be missed or overstated.

Counties around Crosby County

The nearest county rated sinkhole country is Dickens County, TX, about 29 miles east, close enough that the same rock may run under the county line. 2 of the 6 closest counties land in the same band; the ground changes quickly around here.

Garza County, TX 29 mi south · 66% at surface
Dickens County, TX 29 mi east · 63% at surface
Lubbock County, TX 30 mi west · under 1% at surface
Floyd County, TX 32 mi north · 6% at surface
Lynn County, TX 42 mi southwest · 1% at surface
Kent County, TX 42 mi southeast · 72% at surface

What Crosby County is built on

The largest mapped soluble unit here is the Dockum Group, undivided (fine-grained mixed clastic), Late Triassic in age, covering about 13% of the county. Next is the Quartermaster Formation at 1%.

1% of the county sits on gypsum or salt, which dissolves in years rather than millennia. That share matters more than its size suggests.

The county also lies over the Permian Basin, Anadarko Basin,Dalhart Basin, Palo Duro Basin, a deep salt or gypsum basin. Deep beds rarely cause surface collapse on their own, but wells and mining into them have.

Against the rest of Texas

Crosby County ranks 108 of 254 in Texas for soluble rock at the surface, and sits above 71% of US counties on that measure.