Question: What is the capital of a state that includes the Devonian Foreknobs Formation?

Context paragraphs:
Muskeg Formation: The Muskeg Formation is a geologic formation of Middle Devonian (Givetian) age in the Western Canada Sedimentary Basin.  It extends from the plains of northwestern Alberta to northeastern British Columbia, and includes important petroleum and natural gas reservoirs in the Zama lake and Rainbow Lake areas of northwestern Alberta.

Klerf Formation: The Klerf Formation is an Early Devonian (Emsian) formation that includes a Lagerstätte in the Northern Eifel hills, at Willwerath near Prüm, Rhineland-Palatinate, Germany.  In it "Jaekelopterus rhenaniae", a giant eurypterid was discovered.  The Klerf Formation was first described in 1919 by Rudolf Richter (1881-1957).

Foreknobs Formation: The Devonian Foreknobs Formation is a mapped bedrock unit in Pennsylvania, Maryland, Virginia, and West Virginia.

Becraft Formation: The Becraft Formation is a geologic formation of marine sedimentary rock found in New York State.  The Becraft is a part of the lower Devonian Helderberg Group and conformably overlies the New Scotland Formation and is overlain by the Alsen Formation throughout the lower Hudson Valley of New York State.  The formation is Gedinnian in age.  Outcrops of the formation are found from the New York-New Jersey border to the Helderbergs of Albany County, New York and as far west as Schoharie County, New York.  The thickness of the formation varies from around 3 meters in Canajoharie to 8 meters thick in Albany and swells to 27 meters near Kingston.  The Becraft Formation is named for Becraft Mountain in western Columbia County, New York where it prominently crops out.

Tetraxylopteris: Fossils of "Tetraxylopteris" have so far been discovered in two locations.  "T. schmidtii" was named from the Catskill Clastic Wedge, New York State, United States of America, in rocks of Middle to Upper Devonian age (around ERROR!  Start of period Middle Devonian unknown, perhaps because it was mis-spelt or because it is missing from . ) .  "T. reposana" was found in the Campo Chico Formation, north-west Venezuela, in beds believed to be of Frasnian age (ERROR!  Start of period Frasnian unknown, perhaps because it was mis-spelt or because it is missing from . ) .

Antrim Shale: The Antrim Shale is a formation of Upper Devonian age in the Michigan Basin, in the US state of Michigan, and extending into Ohio and Indiana.  It is a major source of natural gas in the northern part of the basin.

West Virginia: West Virginia is a state located in the Appalachian region of the Southern United States.  It is bordered by Virginia to the southeast, Kentucky to the southwest, Ohio to the northwest, Pennsylvania to the north (and, slightly, east), and Maryland to the northeast.  West Virginia is the 10th smallest by area, is ranked 38th in population, and has the second lowest household income of the 50 United States.  The capital and largest city is Charleston.

Devonian Reef: Devonian Reef is located in the Kimberley region in an area once covered by tropical sea.  It is now a protected area of Western Australia and includes three National Parks, the Geikie Gorge National Park, the Tunnel Creek National Park and the Windjana Gorge National Park.  All the parks originated as the Western Australia reef, around 350 million years ago, during the Devonian Period, and now feature rocky landscapes and formation, rich gorges, and plenty of wildlife.  .  The three ranges cut through the Devonian "Great Barrier Reef" and is now exposed to reveal some of the most spectacular landforms in the Kimberley Region.

Stone Mountain (North Carolina): Stone Mountain is the centerpiece of Stone Mountain State Park.  It is a dome of exposed granite (specifically a quartz diorite to granodiorite) of Devonian age, which has intruded into the gneiss of the Precambrian Alligator Back Formation.  It rises sharply over 600 feet (183 m) above the surrounding terrain.  The mountain, which has an elevation of 2,305 feet (706 m) above sea level, is known for its barren sides and distinctive brown-gray color, and can be seen for miles.  The mountain offers some of the best rock climbing in North Carolina, and the park's creeks and streams feature excellent brook trout fishing.

Xitun Formation: The Xitun Formation is a palaeontological formation which named after the Xitun, a location in South China.  This formation it includes many remains of fossilized fish of Early Devonian period (Late Lochkovian).

Supporting paragraphs: Foreknobs Formation West Virginia
Answer: Charleston