Dennis L. Jenkins is a research

archaeologist Archaeology or archeology is the study of human activity through the recovery and analysis of material culture. The archaeological record consists of Artifact (archaeology), artifacts, architecture, biofact (archaeology), biofacts or ecofacts, ...

, field school supervisor for the Oregon State Museum of Anthropology/Museum of Natural and Cultural History at the

University of Oregon The University of Oregon (UO, U of O or Oregon) is a Public university, public research university in Eugene, Oregon, United States. Founded in 1876, the university is organized into nine colleges and schools and offers 420 undergraduate and gra ...

, and director of the university's Northern Great Basin Field School. One of his excavations led to a new accepted date for earliest human settlement in the Americas. Jenkins' work on

coprolite A coprolite (also known as a coprolith) is fossilized feces. Coprolites are classified as trace fossils as opposed to body fossils, as they give evidence for the animal's behaviour (in this case, diet) rather than morphology. The name ...

s earned him the nickname Dr. Poop.

Education and career

From 1975 to 1981 Jenkins was an assistant archaeologist for the Museum of Natural History at the

University of Nevada, Las Vegas The University of Nevada, Las Vegas (UNLV) is a Public university, public Land-grant university, land-grant research university in Paradise, Nevada, United States. The campus is about east of the Las Vegas Strip. It was formerly part of the ...

and a student of Claude Warren. Jenkins earned a

Bachelor of Arts A Bachelor of Arts (abbreviated B.A., BA, A.B. or AB; from the Latin ', ', or ') is the holder of a bachelor's degree awarded for an undergraduate program in the liberal arts, or, in some cases, other disciplines. A Bachelor of Arts deg ...

from the university in 1977 and a

Master of Arts A Master of Arts ( or ''Artium Magister''; abbreviated MA or AM) is the holder of a master's degree awarded by universities in many countries. The degree is usually contrasted with that of Master of Science. Those admitted to the degree have ...

in 1981. From 1981 to 1985 Jenkins was a field director and project archaeologist for the

Fort Irwin Fort Irwin National Training Center (Fort Irwin NTC) is a major training area for the United States military in the Mojave Desert in northern San Bernardino County, California. Fort Irwin is at an average elevation of . It is located northeast ...

(

U.S. Army The United States Army (USA) is the primary land service branch of the United States Department of Defense. It is designated as the Army of the United States in the United States Constitution.Article II, section 2, clause 1 of the United Stat ...

) Archaeological Project in

Barstow, California Barstow is a city in San Bernardino County, California, in the Mojave Desert of Southern California. Located in the Inland Empire region of California, the population was 25,415 at the 2020 United States census, 2020 census. Barstow is an impor ...

. In 1986, Jenkins began work in the

Fort Rock basin A fortification (also called a fort, fortress, fastness, or stronghold) is a military construction designed for the defense of territories in warfare, and is used to establish rule in a region during peacetime. The term is derived from Lati ...

. The Oregon State Museum of Anthropology hired him in 1987. Jenkins received a

Ph.D. A Doctor of Philosophy (PhD, DPhil; or ) is a terminal degree that usually denotes the highest level of academic achievement in a given discipline and is awarded following a course of graduate study and original research. The name of the deg ...

from the University of Oregon in 1991. During his four years as field director of the

Archaeological Project, his work on the late

Pleistocene The Pleistocene ( ; referred to colloquially as the ''ice age, Ice Age'') is the geological epoch (geology), epoch that lasted from to 11,700 years ago, spanning the Earth's most recent period of repeated glaciations. Before a change was fin ...

and early

Holocene The Holocene () is the current geologic time scale, geological epoch, beginning approximately 11,700 years ago. It follows the Last Glacial Period, which concluded with the Holocene glacial retreat. The Holocene and the preceding Pleistocene to ...

epochs in the

Mojave Desert The Mojave Desert (; ; ) is a desert in the rain shadow of the southern Sierra Nevada mountains and Transverse Ranges in the Southwestern United States. Named for the Indigenous peoples of the Americas, indigenous Mohave people, it is located pr ...

resulted in his doctoral thesis ''Site Structure and Chronology of 37 Lake Mojave and Pinto Assemblages from Two Large Multicomponent Sites in the Central Mojave Desert, Southern California''. Since 1987, Jenkins has worked on

Oregon Department of Transportation The Oregon Department of Transportation (ODOT) is a department of the state government of the U.S. state of Oregon responsible for systems of transportation. It was first established in 1969. It had been preceded by the Oregon State Highway De ...

archaeological projects. Jenkins' primary areas of research include the ancient peoples of the Americas, particularly hunter-gatherers in the

Great Basin The Great Basin () is the largest area of contiguous endorheic watersheds, those with no outlets to the ocean, in North America. It spans nearly all of Nevada, much of Utah, and portions of California, Idaho, Oregon, Wyoming, and Baja Californi ...

. Techniques include obsidian sourcing and hydration analysis. His

Paisley Caves The Paisley Caves or the Paisley Five Mile Point Caves complex is a system of eight caves in an arid, desolate region of south-central Oregon, United States north of the present-day city of Paisley, Oregon. The caves are located in the Summer L ...

excavation recovered the oldest known human remains on which

carbon dating Radiocarbon dating (also referred to as carbon dating or carbon-14 dating) is a method for determining the age of an object containing organic material by using the properties of radiocarbon, a radioactive isotope of carbon. The method was ...

has been performed. Four years after Jenkins' work in 2002, prehistoric DNA expert

Eske Willerslev Eske Willerslev (born 5 June 1971) is a Danish evolutionary geneticist notable for his pioneering work in molecular anthropology, palaeontology, and ecology. He currently holds the Prince Philip Professorship in Ecology and Evolution at Univer ...

analyzed his samples. Using

mass spectrometry Mass spectrometry (MS) is an analytical technique that is used to measure the mass-to-charge ratio of ions. The results are presented as a ''mass spectrum'', a plot of intensity as a function of the mass-to-charge ratio. Mass spectrometry is used ...

mitochondrial DNA Mitochondrial DNA (mtDNA and mDNA) is the DNA located in the mitochondrion, mitochondria organelles in a eukaryotic cell that converts chemical energy from food into adenosine triphosphate (ATP). Mitochondrial DNA is a small portion of the D ...

from

coprolites A coprolite (also known as a coprolith) is fossilized feces. Coprolites are classified as trace fossils as opposed to body fossils, as they give evidence for the animal's behaviour (in this case, diet) rather than morphology. The name i ...

, the research determined that people in

haplogroup A haplotype is a group of alleles in an organism that are inherited together from a single parent, and a haplogroup (haploid from the , ''haploûs'', "onefold, simple" and ) is a group of similar haplotypes that share a common ancestor with a sing ...

s A2 and B2 lived in south central

Oregon Oregon ( , ) is a U.S. state, state in the Pacific Northwest region of the United States. It is a part of the Western U.S., with the Columbia River delineating much of Oregon's northern boundary with Washington (state), Washington, while t ...

12,300 radiocarbon years B.P., about one thousand years earlier than the accepted date for the

Clovis culture The Clovis culture is an archaeological culture from the Paleoindian period of North America, spanning around 13,050 to 12,750 years Before Present (BP). The type site is Blackwater Draw locality No. 1 near Clovis, New Mexico, where stone too ...

. The new date of earliest human settlement, after publication in 2008, became accepted by many scientists. Since 2000, Jenkins has served as a

Chautauqua Chautauqua ( ) is an adult education and social movement in the United States that peaked in popularity in the late 19th and early 20th centuries. Chautauqua assemblies expanded and spread throughout rural America until the mid-1920s. The Cha ...

Lecturer, explaining to people all over Oregon the techniques used to research the migration of early Americans.

Publications

Jenkins has authored co-authored or edited over 80 papers and publications among them are:

References

External links

Interview: Finding Pre-Clovis Humans in the Oregon High DesertNGBPP Research at the Paisley Caves

Research Gate, Dennis Jenkins
{{DEFAULTSORT:Jenkins, Dennis Living people University of Oregon alumni University of Nevada, Las Vegas alumni American archaeologists University of Oregon faculty Year of birth missing (living people)