Natural Trap Cave is a

pit cave A pit cave, shaft cave or vertical cave—or often simply called a pit (in the US) and pothole or pot (in the UK); jama in South Slavic languages scientific and colloquial vocabulary (borrowed since early research in the Western Balkan Dinaric ...

in the

Bighorn Mountains The Bighorn Mountains ( cro, Basawaxaawúua, lit=our mountains or cro, Iisaxpúatahchee Isawaxaawúua, label=none, lit=bighorn sheep's mountains) are a mountain range in northern Wyoming and southern Montana in the United States, forming a ...

, in northern

Wyoming Wyoming () is a U.S. state, state in the Mountain states, Mountain West subregion of the Western United States. It is bordered by Montana to the north and northwest, South Dakota and Nebraska to the east, Idaho to the west, Utah to the south ...

, United States. Excavations in the cave are an important source of

paleontological Paleontology (), also spelled palaeontology or palæontology, is the scientific study of life that existed prior to, and sometimes including, the start of the Holocene epoch (geology), epoch (roughly 11,700 years before present). It includes t ...

information on the North American

Late Pleistocene The Late Pleistocene is an unofficial Age (geology), age in the international geologic timescale in chronostratigraphy, also known as Upper Pleistocene from a Stratigraphy, stratigraphic perspective. It is intended to be the fourth division of ...

, due to a rich layer of fossils from animals that became trapped in the cave.

Location

The cave is located northeast of

Lovell, Wyoming Lovell is the largest town in Big Horn County, Wyoming, United States. The population was 2,360 at the 2010 census. History Lovell was named for Henry Lovell, a local rancher. Built in 1925, the EJZ Bridge over Shoshone River is listed on th ...

, at an elevation of . It is a bell-shaped pit or sinkhole within the

Madison Limestone The Madison Limestone is a thick sequence of mostly carbonate rocks of Mississippian age in the Rocky Mountain and Great Plains areas of the western United States. The rocks serve as an important aquifer as well as an oil reservoir in places. Th ...

, deep, with an opening by at the top, and a diameter of around at the bottom.

Early explorations

The first investigation of its animal remains was initiated in 1970 by

Lawrence Loendorf Lawrence may refer to: Education Colleges and universities * Lawrence Technological University, a university in Southfield, Michigan, United States * Lawrence University, a liberal arts university in Appleton, Wisconsin, United States Preparator ...

of the

University of Missouri The University of Missouri (Mizzou, MU, or Missouri) is a public university, public Land-grant university, land-grant research university in Columbia, Missouri. It is Missouri's largest university and the flagship of the four-campus Universit ...

, who initially collected some fossils, and began an excavation in 1971. Besides bones, one Native American red jasper knife was found below the entrance drop and a wooden artifact, possibly an

atlatl A spear-thrower, spear-throwing lever or ''atlatl'' (pronounced or ; Nahuatl ''ahtlatl'' ) is a tool that uses leverage to achieve greater velocity in dart or javelin-throwing, and includes a bearing surface which allows the user to store ene ...

shaft, was discovered in a rat's nest below some talus. In 1972, Carol Jo Rushin (University of Montana) with a grant from the National Speleological Society and a four-person team and logistical support provided by Dr. Loendorf, excavated a 10 x 10-foot wide pit at the bottom of the entrance drop, southwest of the pit excavated in 1971. The pit was dug to a depth of six feet. Late Pleistocene to recent bones from 20 species of mammals and five bird species were recovered, including a dire wolf, ancient horse, and mammoth. Ms. Rushin's Master's thesis "Interpretive and Paleontologic Values of Natural Trap Cave, BigHorn Mountains, Wyoming" (1973) addressed the interpretive, anthropologic, paleontologic, and geologic aspects of the cave. A short article regarding this research also appeared in the December, 1972 issue of the National Speleological Society News. Further excavations were conducted throughout the 1970s by the University of Missouri and the

University of Kansas The University of Kansas (KU) is a public research university with its main campus in Lawrence, Kansas, United States, and several satellite campuses, research and educational centers, medical centers, and classes across the state of Kansas. Tw ...

. Remains of animals which have fallen into the sinkhole since the last ice age lie over deep at the bottom of the pit. Small mammals whose remains have been found in the cave include

pika A pika ( or ; archaically spelled pica) is a small, mountain-dwelling mammal found in Asia and North America. With short limbs, very round body, an even coat of fur, and no external tail, they resemble their close relative, the rabbit, but wi ...

jackrabbit Hares and jackrabbits are mammals belonging to the genus ''Lepus''. They are herbivores, and live solitarily or in pairs. They nest in slight depressions called forms, and their young are able to fend for themselves shortly after birth. The gen ...

cottontail rabbit Cottontail rabbits are the leporid species in the genus ''Sylvilagus'', found in the Americas. Most ''Sylvilagus'' species have stub tails with white undersides that show when they retreat, giving them their characteristic name. However, this ...

marmot Marmots are large ground squirrels in the genus ''Marmota'', with 15 species living in Asia, Europe, and North America. These herbivores are active during the summer, when they can often be found in groups, but are not seen during the winter, w ...

chipmunk Chipmunks are small, striped rodents of the family Sciuridae. Chipmunks are found in North America, with the exception of the Siberian chipmunk which is found primarily in Asia. Taxonomy and systematics Chipmunks may be classified either as ...

s, ''

Peromyscus ''Peromyscus'' is a genus of rodents. They are commonly referred to as deer mice or deermice, not to be confused with the chevrotain or "mouse deer". They are New World mice only distantly related to the common house and laboratory mouse, ''Mu ...

'' mice,

woodrat A pack rat or packrat, also called a woodrat or trade rat, are any species in the North and Central American rodent genus ''Neotoma''. Pack rats have a rat-like appearance, with long tails, large ears, and large, black eyes. Pack rats are notice ...

s, ''

Microtus ''Microtus'' is a genus of voles found in North America, Europe and northern Asia. The genus name refers to the small ears of these animals. About 62 species are placed in the genus. They are stout rodents with short ears, legs and tails. They ea ...

'' voles, and

collared lemming ''Dicrostonyx'' is a genus of rodent in the family Cricetidae. It contains the collared lemmings. They are the only North American rodents that turn completely white in winter. It contains the following species: * Northern collared lemming (''Dic ...

s. Larger mammals represented in the cave include ''

Canis ''Canis'' is a genus of the Caninae which includes multiple extant species, such as wolves, dogs, coyotes, and golden jackals. Species of this genus are distinguished by their moderate to large size, their massive, well-developed skulls and den ...

'' species,

red fox The red fox (''Vulpes vulpes'') is the largest of the true foxes and one of the most widely distributed members of the Order (biology), order Carnivora, being present across the entire Northern Hemisphere including most of North America, Europe ...

es,

short-faced bear The Tremarctinae or short-faced bears is a subfamily of Ursidae that contains one living representative, the spectacled bear (''Tremarctos ornatus'') of South America, and several extinct species from four genera: the Florida spectacled bear ('' ...

weasel Weasels are mammals of the genus ''Mustela'' of the family Mustelidae. The genus ''Mustela'' includes the least weasels, polecats, stoats, ferrets and European mink. Members of this genus are small, active predators, with long and slender bo ...

marten A marten is a weasel-like mammal in the genus ''Martes'' within the subfamily Guloninae, in the family Mustelidae. They have bushy tails and large paws with partially retractile claws. The fur varies from yellowish to dark brown, depending on t ...

wolverine The wolverine (), (''Gulo gulo''; ''Gulo'' is Latin for "gluttony, glutton"), also referred to as the glutton, carcajou, or quickhatch (from East Cree, ''kwiihkwahaacheew''), is the largest land-dwelling species of the family Mustelidae. It is ...

American cheetah The American cheetah is either of two feline species of the extinct genus ''Miracinonyx'', endemic to North America during the Pleistocene epoch (2.6 million to 12,000 years ago) and morphologically similar to the modern cheetah (''Acinonyx j ...

American lion ''Panthera atrox'', better known as the American lion, also called the North American lion, or American cave lion, is an extinct pantherine cat that lived in North America during the Pleistocene epoch and the early Holocene epoch, about 340,0 ...

s, '' Equus'' species, ''

Camelops ''Camelops''Being occasionally called ''Western Camel'' or ''Yesterday's Camel''. is an extinct genus of camels that lived in North and Central America, ranging from Alaska to Guatemala, from the middle Pliocene to the end of the Pleistocene. It ...

'',

deer Deer or true deer are hoofed ruminant mammals forming the family Cervidae. The two main groups of deer are the Cervinae, including the muntjac, the elk (wapiti), the red deer, and the fallow deer; and the Capreolinae, including the reindeer ...

antilocaprid The Antilocapridae are a family of artiodactyls endemic to North America. Their closest extant relatives are the giraffids with which they comprise the superfamily Giraffoidea. Only one species, the pronghorn (''Antilocapra americana''), is liv ...

bison Bison are large bovines in the genus ''Bison'' (Greek: "wild ox" (bison)) within the tribe Bovini. Two extant and numerous extinct species are recognised. Of the two surviving species, the American bison, ''B. bison'', found only in North Ame ...

bighorn sheep The bighorn sheep (''Ovis canadensis'') is a species of sheep native to North America. It is named for its large horns. A pair of horns might weigh up to ; the sheep typically weigh up to . Recent genetic testing indicates three distinct subspec ...

, and

mammoth A mammoth is any species of the extinct elephantid genus ''Mammuthus'', one of the many genera that make up the order of trunked mammals called proboscideans. The various species of mammoth were commonly equipped with long, curved tusks and, ...

s. Remains of the American cheetah are particularly abundant in the cave.

2014 explorations

The entrance to the pit was covered with a safety grill by the

Bureau of Land Management The Bureau of Land Management (BLM) is an agency within the United States Department of the Interior responsible for administering federal lands. Headquartered in Washington DC, and with oversight over , it governs one eighth of the country's la ...

for almost thirty years. In July–August 2014, a team of scientists of

Des Moines University Des Moines University (DMU) is a private medical school in Des Moines, Iowa. Founded in 1898, Des Moines University is the second oldest osteopathic medical school and the fifteenth largest medical school in the United States. DMU's three colleg ...

, led by Julie Meachen, a

paleontologist Paleontology (), also spelled palaeontology or palæontology, is the scientific study of life that existed prior to, and sometimes including, the start of the Holocene epoch (roughly 11,700 years before present). It includes the study of fossi ...

specialising in

Pleistocene megafauna Pleistocene megafauna is the set of large animals that lived on Earth during the Pleistocene epoch. Pleistocene megafauna became extinct during the Quaternary extinction event resulting in substantial changes to ecosystems globally. The role of hu ...

, explored the hole over a period of two weeks. This was the first of three annual digs planned from 2014 to 2016. The team excavated 200 large bones of large animals which included

horses The horse (''Equus ferus caballus'') is a domesticated, one-toed, hoofed mammal. It belongs to the taxonomic family Equidae and is one of two extant subspecies of ''Equus ferus''. The horse has evolved over the past 45 to 55 million yea ...

and

gray wolf The wolf (''Canis lupus''; : wolves), also known as the gray wolf or grey wolf, is a large canine native to Eurasia and North America. More than thirty subspecies of ''Canis lupus'' have been recognized, and gray wolves, as popularly ...

, as well as, innumerable

microfossils A microfossil is a fossil that is generally between 0.001 mm and 1 mm in size, the visual study of which requires the use of light or electron microscopy. A fossil which can be studied with the naked eye or low-powered magnification, ...

of birds and reptiles. The cave remains at temperatures below and has 98% humidity which is conducive for the preservation of viable genetic material for analysis. The team has extracted samples which will be analysed by the

Australian Centre for Ancient DNA Australian(s) may refer to: Australia * Australia, a country * Australians, citizens of the Commonwealth of Australia ** European Australians ** Anglo-Celtic Australians, Australians descended principally from British colonists ** Aboriginal Aus ...

at the

University of Adelaide The University of Adelaide (informally Adelaide University) is a public research university located in Adelaide, South Australia. Established in 1874, it is the third-oldest university in Australia. The university's main campus is located on N ...

for fragments of

mitochondrial DNA Mitochondrial DNA (mtDNA or mDNA) is the DNA located in mitochondria, cellular organelles within eukaryotic cells that convert chemical energy from food into a form that cells can use, such as adenosine triphosphate (ATP). Mitochondrial D ...

. Scientists expect to find information pertaining to causes of the

Quaternary extinction event The Quaternary period (from 2.588 ± 0.005 million years ago to the present) has seen the extinctions of numerous predominantly megafaunal species, which have resulted in a collapse in faunal density and diversity and the extinction of key ecolog ...

, such as climate change and the advent of prehistoric man around 17,000 years ago. New insights are being sought as regards the ecology, diet and genetic diversity of megafauna that became extinct more than 10,000 years ago. During the excavation, a

pack rat A pack rat or packrat, also called a woodrat or trade rat, are any species in the North and Central American rodent genus ''Neotoma''. Pack rats have a rat-like appearance, with long tails, large ears, and large, black eyes. Pack rats are notice ...

fell into the pit and died. Affectionately termed as the expedition mascot "Packy Le Pew", the pack rat has become an experiment in

taphonomy Taphonomy is the study of how organisms decay and become fossilized or preserved in the paleontological record. The term ''taphonomy'' (from Greek , 'burial' and , 'law') was introduced to paleontology in 1940 by Soviet scientist Ivan Efremov t ...

, in that its body has been allowed to lie undisturbed so as to study natural patterns and rates of decay.

References

External links

* Web pages :
National Park Service page on Natural Trap Cave
* Videos : ** BBC World News Video of 8 Aug 2014 title
"Dig this ANCIENT BONES FOUND in Wyoming CAVE BREAKING NEWS 2014"
** Australian Centre for Ancient DNA Video of 5 August 2014 title
"Insights from Natural Trap Cave"
featuring Professor

Alan Cooper Alan Cooper (born June 3, 1952) is an American software designer and programmer. Widely recognized as the "Father of Visual Basic", Cooper is also known for his books ''About Face: The Essentials of Interaction Design'' and ''The Inmates Are R ...

of the University of Adelaide who discusses fossil finds from the Natural Trap Cave in Wyoming. ** Newsy Science Video of 9 August 2014 title
"Remains Of Ancient Horses, Lions, Found In Wyo. Cave"
{{authority control Caves of Wyoming Landforms of Big Horn County, Wyoming Paleontology in Wyoming Pleistocene United States Quaternary Wyoming Pleistocene paleontological sites of North America Protected areas of Big Horn County, Wyoming Bureau of Land Management areas in Wyoming