Clear Fork Formation

Operator-reported tops from 55,309 wells across 45 counties, median tops running 495–6,830 ft by county.

Depth by County

County	Wells	Median Top	Typical Range	CSV
Midland	8,455	6,830 ft	6,118–7,235	↓
Howard	5,274	4,547 ft	2,874–5,587	↓
Ector	4,623	5,507 ft	5,307–7,100	↓
Andrews	4,588	6,529 ft	5,594–7,049	↓
Martin	3,469	6,336 ft	5,342–6,788	↓
Glasscock	3,079	5,463 ft	3,732–6,133	↓
Reagan	2,915	5,040 ft	3,675–5,806	↓
Gaines	2,886	6,466 ft	6,124–7,275	↓
Mitchell	2,660	2,578 ft	2,376–3,026	↓
Irion	2,293	3,250 ft	2,410–4,071	↓
Upton	2,201	6,540 ft	5,899–7,113	↓
Scurry	2,059	2,675 ft	2,380–3,182	↓
Ector	1,431	3,992 ft	3,535–4,775	↓
Yoakum	1,085	6,487 ft	5,997–7,550	↓
Crosby	968	4,146 ft	3,867–4,383	↓
Crockett	907	2,834 ft	1,810–3,955	↓
Hockley	820	6,124 ft	5,760–6,963	↓
Winkler	757	5,290 ft	5,020–6,000	↓
Borden	688	4,820 ft	3,203–6,122	↓
Terry	674	6,516 ft	6,124–7,323	↓
Lubbock	563	5,126 ft	4,490–5,700	↓
Ward	453	4,891 ft	4,430–5,617	↓
Pecos	373	3,044 ft	2,350–3,801	↓
Dawson	362	5,815 ft	4,872–6,705	↓
Sterling	337	2,895 ft	2,138–4,105	↓
Garza	281	3,176 ft	2,520–3,960	↓
Hale	246	5,324 ft	4,688–5,743	↓
Tom Green	214	1,230 ft	957–3,296	↓
Kent	200	2,128 ft	2,037–2,824	↓
Schleicher	177	2,392 ft	1,300–3,646	↓
Lamb	97	5,370 ft	5,081–5,973	↓
Sherman	22	1,006 ft	229–1,384	↓
Cochran	22	6,418 ft	5,500–7,150	↓
Coke	21	1,242 ft	877–2,052	↓
Cottle	17	705 ft	490–940	↓
Sutton	16	2,827 ft	2,258–3,018	↓
Dickens	12	2,173 ft	1,759–2,793	↓
Nolan	12	1,218 ft	1,140–1,666	↓
Potter	12	2,269 ft	1,489–2,518	↓
Moore	9	1,816 ft	1,204–1,859	↓
Motley	7	1,663 ft	1,632–2,354	↓
Foard	7	495 ft	407–551	↓
Terrell	7	3,396 ft	2,635–3,503	↓
King	5	614 ft	424–628	↓
Fisher	5	1,312 ft	857–1,492	↓

Counties with fewer than 5 wells omitted. Depths are measured depth as filed; typical range is the 10th–90th percentile of reported tops — raw filings contain occasional typo depths, so extremes are not shown.