Mississippian Formation

Operator-reported tops from 8,767 wells across 75 counties, median tops running 2,352–18,048 ft by county.

Top depth: 4,680 ft 12,068 ft

566 wells shown (sampled from 8,767)

Depth by County

County	Wells	Median Top	Typical Range	CSV
Martin	1,221	10,404 ft	10,004–11,204	↓
Howard	793	9,802 ft	9,284–10,113	↓
Young	738	4,610 ft	4,300–5,007	↓
Throckmorton	621	4,710 ft	4,512–5,059	↓
Stephens	352	4,340 ft	4,064–4,506	↓
Archer	325	5,188 ft	4,996–5,350	↓
Shackelford	276	4,510 ft	4,094–4,967	↓
Glasscock	253	10,298 ft	9,493–10,708	↓
Borden	232	8,595 ft	8,170–9,298	↓
Garza	229	8,062 ft	7,533–8,600	↓
Dawson	191	11,016 ft	10,146–11,580	↓
Jack	183	5,228 ft	4,720–5,651	↓
Andrews	183	10,040 ft	9,029–12,080	↓
Eastland	161	3,642 ft	3,198–3,952	↓
Ochiltree	157	8,598 ft	7,964–9,860	↓
Hardeman	152	7,820 ft	7,558–8,370	↓
King	148	5,887 ft	5,749–6,031	↓
Gaines	144	10,400 ft	10,032–12,031	↓
Midland	141	11,250 ft	10,859–11,687	↓
Yoakum	111	11,122 ft	10,650–11,998	↓
Baylor	108	5,280 ft	5,146–5,449	↓
Hansford	106	7,740 ft	7,053–8,136	↓
Reeves	99	12,180 ft	9,862–15,940	↓
Pecos	97	12,898 ft	10,215–17,518	↓
Lipscomb	90	10,075 ft	9,107–11,435	↓
Culberson	82	8,900 ft	5,894–13,690	↓
Winkler	79	8,445 ft	7,818–17,878	↓
Clay	77	5,972 ft	5,643–6,249	↓
Ward	71	12,770 ft	8,088–16,116	↓
Scurry	66	7,758 ft	7,462–8,178	↓
Crane	64	8,140 ft	7,762–8,971	↓
Haskell	59	5,746 ft	4,990–5,916	↓
Stonewall	59	6,072 ft	5,867–6,232	↓
Ector	56	10,960 ft	8,739–11,515	↓
Mitchell	55	7,736 ft	7,098–8,027	↓
Kent	55	7,400 ft	7,227–7,593	↓
Roberts	53	9,880 ft	8,608–12,111	↓
Sherman	52	6,381 ft	5,275–6,926	↓
Nolan	50	6,752 ft	6,005–7,077	↓
Brown	50	2,352 ft	2,010–2,944	↓
Hutchinson	50	6,723 ft	6,540–8,490	↓
Sterling	43	8,034 ft	7,601–8,434	↓
Wilbarger	41	6,886 ft	4,729–7,868	↓
Coleman	40	3,525 ft	2,596–4,293	↓
Terry	40	11,313 ft	10,955–12,248	↓
Lynn	37	9,007 ft	8,893–10,496	↓
Upton	34	10,211 ft	9,734–11,265	↓
Runnels	32	4,488 ft	4,055–4,659	↓
Callahan	31	4,074 ft	3,909–4,479	↓
Palo Pinto	30	4,495 ft	4,034–4,874	↓
Denton	27	7,770 ft	7,322–8,141	↓
Erath	26	2,750 ft	2,487–2,986	↓
Hemphill	26	13,949 ft	12,127–16,466	↓
Taylor	24	4,850 ft	4,489–5,701	↓
Fisher	24	6,554 ft	5,878–6,851	↓
Loving	20	18,048 ft	17,681–18,820	↓
Wheeler	17	14,164 ft	12,859–16,360	↓
Wise	16	6,633 ft	5,737–7,834	↓
Cottle	16	6,554 ft	6,147–8,041	↓
Cochran	14	11,055 ft	10,549–11,268	↓
Johnson	14	7,053 ft	6,354–8,060	↓
Hockley	13	11,286 ft	11,063–11,431	↓
Knox	13	6,084 ft	5,061–6,307	↓
Sutton	13	6,465 ft	6,441–9,040	↓
Montague	12	6,449 ft	4,670–7,581	↓
Reagan	12	9,717 ft	9,360–11,249	↓
Foard	11	5,905 ft	5,273–6,610	↓
Terrell	9	12,326 ft	11,750–15,054	↓
Crockett	8	9,557 ft	9,042–9,949	↓
Jones	7	5,028 ft	4,735–5,348	↓
Hudspeth	6	3,710 ft	1,898–6,827	↓
Moore	6	3,270 ft	2,728–5,901	↓
Parker	6	5,022 ft	4,926–5,419	↓
Coke	5	7,196 ft	7,123–7,271	↓
Floyd	5	9,944 ft	9,335–10,471	↓

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.