Question: What counties was Moonlight Basin located in?

Context paragraphs:
Woodlark Basin: The Woodlark Basin is a geologic structural basin located in the southwestern Pacific Ocean and can be found to the southwest of the island country of Papua New Guinea.  The basin is an extensional basin that is actively spreading and has a seafloor spreading center.  This basin lies between the Indo-Australian Plate and the Solomon microplate and is located at 09°S, 155°E.  The Woodlark Basin has an interesting geologic history dating back twenty million years to the initial opening of the basin; the spreading of the basin, however, has occurred within the past three million years.  Due to the relatively young age of the basin, many researchers are interested in learning how the basin will continue to develop over time and how the plates will subduct.  The subduction of the plates in the Woodlark Basin will be unique because the new crust being formed will be young and warm unlike most crust that gets subducted due to its low temperature and high density.

Amazon Basin (sedimentary basin): The Amazon Basin is a major 620000 km2 large sedimentary basin located roughly at the middle and lower course of the Amazon River, south the Guiana Shield and north of the Central Brazilian Shield.  It is bound to the west by the Púrus Arch, separating the Amazon Basin from the Solimões Basin and in the east by the Gurupá Arch, separating the basin from the Marajó Basin.  The basin developed on a rift that originated possibly about 550 million years ago during the Cambrian.  Parts of the rift were reactivated during the opening of the South Atlantic.

Niger Delta Basin (geology): The Niger Delta Basin, also referred to as the Niger Delta province, is an extensional rift basin located in the Niger Delta and the Gulf of Guinea on the passive continental margin near the western coast of Nigeria with suspected or proven access to Cameroon, Equatorial Guinea and São Tomé and Príncipe.  This basin is very complex, and it carries high economic value as it contains a very productive petroleum system.  The Niger delta basin is one of the largest subaerial basins in Africa.  It has a subaerial area of about 75,000 km, a total area of 300,000 km, and a sediment fill of 500,000 km.  The sediment fill has a depth between 9–12 km.  It is composed of several different geologic formations that indicate how this basin could have formed, as well as the regional and large scale tectonics of the area.  The Niger Delta Basin is an extensional basin surrounded by many other basins in the area that all formed from similar processes.  The Niger Delta Basin lies in the south westernmost part of a larger tectonic structure, the Benue Trough.  The other side of the basin is bounded by the Cameroon Volcanic Line and the transform passive continental margin.

Bransfield Basin: The Bransfield Basin is a back-arc rift basin located off the Northern tip of the Antarctic Peninsula.  The basin lies within a Northeast and Southwest trending strait that separates the peninsula from the nearby South Shetland Islands to the Northwest.  The basin extends for more than 500 km from Smith Island (South Shetland Islands) to a portion of the Hero Fracture Zone.  The basin can be subdivided into three basins: Western, Central, and Eastern.  The Western basin is 130 km long by 70 km wide with a depth of 1.3 km , the Central basin is 230 km long by 60 km wide with a depth of 1.9 km , and the Eastern basin is 150 km long by 40 km wide with a depth of over 2.7 km .  The three basins are separated by the Deception Island and Bridgeman Island.  The moho depth in the region has been seismically interpreted to be roughly 34 km deep.

Los Angeles Basin: The Los Angeles Basin is a sedimentary basin located in southern California, in a region known as the Peninsular Ranges.  The basin is also connected to an anomalous group of east-west trending chain of mountains collectively known as the California Transverse Ranges.  The present basin is a coastal lowland area, whose floor is marked by elongate low ridges and groups of hills that is located on the edge of the Pacific plate.  The Los Angeles Basin, along with the Santa Barbara Channel, the Ventura Basin, the San Fernando Valley, and the San Gabriel Basin, lies within the greater southern California region.  On the north, northeast, and east, the lowland basin is bound by the Santa Monica Mountains and Puente, Elysian, Repetto hills.  To the southeast, the basin is bordered by the Santa Ana mountains and the San Joaquin Hills.  The western boundary of the basin is marked by the Continental Borderland and is part of the onshore portion.  The California borderland is characterized by north-west trending offshore ridges and basins.  The Los Angeles Basin is notable for its great structural relief and complexity in relation to its geologic youth and small size for its prolific oil production.  Yerkes et al. identify 5 major stages of the basin's evolution that begins in the Upper Cretaceous and ends in the Pleistocene.  This basin can be classified as an irregular pull-apart basin accompanied by rotational tectonics during the post-early Miocene.

Big Sky, Montana: Big Sky is a census-designated place (CDP) in Gallatin and Madison counties in southwestern Montana.  As of the 2010 census it had a population of 2,308.  It is 45 mi southwest of Bozeman.  This unincorporated community straddles the two counties, is not considered a town, and has no town government.  The primary industry of the area is tourism.

Moonlight Basin: Moonlight Basin was a ski resort in southwestern Montana, located in the Madison Range of the Rocky Mountains in the resort village of Big Sky.  In October 2013, it, along with ski terrain within the Club at Spanish Peaks, were consolidated into Big Sky Resort, making Big Sky the largest single ski resort in the United States, with 5,750 acres (2,330 ha) of terrain and over 30 ski lifts.

Salta Basin: Salta Basin or Salta Rift Basin is a sedimentary basin located in the Argentine Northwest.  The basin started to accumulate sediments in the Early Cretaceous (Neocomian) and at present it has sedimentary deposits reaching thicknesses of 5000 m .  The basin contains seven sub-basins: Tres Cruces, Lomas de Olmedo, Metán, Alemanía, Salfity, El Rey, Sey and Brealito.  The basin environment has variously been described as a "foreland rift" and an "intra-continental rift".  The basin developed under conditions of extensional tectonics and rift-associated volcanism.

Adare Basin: The Adare Basin is a geologic structural basin located north-east of Cape Adare of Antarctica, for which its named, and north of the western Ross Sea.  The Adare basin is an extensional rift basin located along a seafloor spreading center that forms the failed arm of the tertiary spreading ridge separating East and West Antarctica, known as the West Antarctic Rift System and similar in structure to The East Africa Rift System.  Centrally located in the Adare Basin is the Adare Trough.  The extension of this rift system is recorded in a series of magnetic anomalies which run along the seafloor at the extinct, north-south trending, Adare spreading axis.  The Adare spreading system continues unbroken into the Northern Basin underlying the adjacent Ross Sea continental shelf.

San Juan Basin: The San Juan Basin is a geologic structural basin located near the Four Corners region of the Southwestern United States.  The basin covers 7,500 square miles and resides in northwestern New Mexico, southwestern Colorado, and parts of Utah and Arizona.  Specifically, the basin occupies space in the San Juan, Rio Arriba, Sandoval, and McKinley counties in New Mexico, and La Plata and Archuleta counties in Colorado.  The basin extends roughly 100 miles N-S and 90 miles E-W.

Supporting paragraphs: Moonlight Basin Big Sky, Montana
Answer: Gallatin and Madison