Question: The Ribes glandulosum can be found in several places the United States, including a mountain range formed approximately how many years ago?

Context paragraphs:
McDowell Mountains: The McDowell Mountain Range (Yavapai: Wi:kajasa) is located about twenty miles north-east of downtown Phoenix, Arizona, and may be seen from most places throughout the city.  The range is composed of miocene deposits left nearly five million years ago.  The McDowells share borders with the cities of Fountain Hills, Scottsdale, and Maricopa County.  The city of Scottsdale has made its share of the McDowells a preserve, and has set up a wide trail network in partnership with the McDowell Sonoran Conservancy.  The McDowell Sonoran Conservancy was established in 1991.  The highest peak in the McDowells is East End, at 4,069 ft .  This mountain range also serves as a sacred marker to the Yavapai people.  The boundaries of the range are generally defined by Saddleback Mountain in the South and Granite Mountain as the Northern boundary.  The McDowells also comprise popular landmarks such as Pinnacle Peak and Tom's Thumb.  Although technically a stand-alone, Mt. McDowell (referred to as Red Mountain by Phoenix residents), not to be confused with McDowell Peak, is sometimes listed on maps as a part of the McDowell Mountains.

Lake Atna: Lake Atna ( ; also known as Lake Ahtna) was a prehistoric proglacial lake that initially formed approximately 58 ka (thousand years ago) in the Copper River Basin, an area roughly centered around 245 km northeast of modern-day Anchorage, Alaska.  The lake formed and dispersed during the Wisconsin glaciation.  The lake existed in several forms, with several prominent shorelines observable in modern geology.  At its greatest extent, the lake surface area was approximately half the size of modern-day Lake Ontario, and possibly much larger.  The basin of the lake lay within an area bordered by the Alaska Range to the north, the Wrangell Mountains to the east, the Chugach Mountains to the south, and the Talkeetna Mountains to the west.  Lake Atna may have generated several of the largest ever glacial lake outburst floods.  One such flood may have contributed to the destruction caused by the 1964 Alaska earthquake.

Lake Hitchcock: Lake Hitchcock was a glacial lake that formed approximately 15,000 years ago in the late Pleistocene epoch.  After the Laurentide ice sheet retreated, glacial ice melt accumulated at the terminal moraine and blocked up the Connecticut River, creating the long, narrow lake.  The lake existed for approximately 3,000 years, after which a combination of erosion and continuing geological changes likely caused it to drain.  At its longest, Lake Hitchcock stretched from the moraine dam at present-day Rocky Hill, Connecticut, to St. Johnsbury, Vermont (about 320 km ).  Although the rift valley through which the river flows above Rocky Hill actually continues south to New Haven, on Long Island Sound, the obstructing moraine at Rocky Hill diverted the river southeast to its present mouth at Old Saybrook.

Ribes glandulosum: Ribes glandulosum, the skunk currant, is a North American species of flowering plant in the currant family.  It is widespread in Canada (all 10 provinces and all 3 territories) and is also found in parts of the United States (Alaska, the Great Lakes region, the Appalachian Mountains, and the Northeast).

Mazon Creek fossil beds: The Mazon Creek fossil beds are a conservation "lagerstätte " found near Morris, in Grundy County, Illinois.  The fossils are preserved in ironstone concretions, formed approximately   million years ago in the mid-Pennsylvanian epoch of the Carboniferous period.  These concretions frequently preserve both hard and soft tissues of animal and plant materials, as well as many soft-bodied organisms that do not normally fossilize.  The quality, quantity and diversity of fossils in the area, known since the mid-nineteenth century, make the Mazon Creek "lagerstätte " important to paleontologists, in attempting to reconstruct the paleoecology of the sites.  The locality was declared a National Historic Landmark in 1997.

Jenny Lake: Jenny Lake is located in Grand Teton National Park in the U.S. state of Wyoming.  The lake was formed approximately 12,000 years ago by glaciers pushing rock debris which carved Cascade Canyon during the last glacial maximum, forming a terminal moraine which now impounds the lake.  The lake is estimated to be 423 ft deep and encompasses 1191 acre .  Jenny Lake is considered to be a major focal point in Grand Teton National Park, with many hiking trails, scenic boat rides, and quick access to the major climbing routes onto the tallest peaks of the Teton Range.

UX Tauri: UX Tauri, abbreviated as UX Tau, is a binary star system approximately 450 light-years away in the constellation of Taurus (the Bull).  It is notable for the fact that, despite its recent (in stellar terms) creation, the Spitzer Space Telescope discovered that its protoplanetary disk contains a gap.  The dust, which normally accumulates in an expanding ring starting right next to the star at such a young age, is either very thin or nonexistent at a range of 0.2 to 56 AU from the star.  Typically, this means that the early ancestors of planets may be forming from the disk, though the star only ignited about 1 million years ago.  In contrast, Earth was formed approximately 4.54 billion years ago, placing its formation about sixty million years after the Sun's ignition around 4.6 billion years ago.

Tecuamburro: Tecuamburro is a stratovolcano in southern Guatemala, roughly 50 kilometres south east of Guatemala City.  The Tecuamburro is an andesitic stratovolcano which formed approximately 38,000 years ago inside a horseshoe-shaped caldera formed by a structural failure in a second, 100,000-year-old stratovolcano, known as Miraflores.  At the top of the Tecuamburro is an acidic crater lake around which many hot springs, fumaroles, and boiling mudpots are found.

Appalachian Mountains: The Appalachian Mountains ( , French: "les Appalaches" ), often called the Appalachians, are a system of mountains in eastern North America.  The Appalachians first formed roughly 480 million years ago during the Ordovician Period.  It once reached elevations similar to those of the Alps and the Rocky Mountains before naturally occurring erosion.  The Appalachian chain is a barrier to east-west travel, as it forms a series of alternating ridgelines and valleys oriented in opposition to most roads running east or west.

Indigenous people of the Everglades region: The indigenous people of the Everglades region arrived in the Florida peninsula of what is now the United States approximately 14,000 to 15,000 years ago, probably following large game.  The Paleo-Indians found an arid landscape that supported plants and animals adapted to prairie and xeric scrub conditions.  Large animals became extinct in Florida around 11,000 years ago.  Climate changes 6,500 years ago brought a wetter landscape.  The Paleo-Indians slowly adapted to the new conditions.  Archaeologists call the cultures that resulted from the adaptations Archaic peoples.  They were better suited for environmental changes than their ancestors, and created many tools with the resources they had.  Approximately 5,000 years ago, the climate shifted again to cause the regular flooding from Lake Okeechobee that gave rise to the Everglades ecosystems.

Supporting paragraphs: Ribes glandulosum Appalachian Mountains
Answer: 480 million