Natural Mounds

Campbell, Marius R.

doi:10.1086/621357

Cited by 7 publications

(8 citation statements)

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“…Drought conditions suggested by nebkha deposition in the midcontinent may have become severe only locally due to edaphic conditions. A close association of pimple mounds and dense subsoil pans reported in the literature (Branner, 1905;Purdue, 1905;Campbell, 1906;Koons, 1948;Knechtel, 1952;Melton, 1954;Ross et al, 1968;Jenny, 1980;Carty et al, 1988;Horwath and Johnson, 2006) is verified by our catalog of soil series at southern midcontinent mound fields. Of the 251 sites we visited 89% are mapped on U.S.…”

Section: Edaphic Controlssupporting

confidence: 81%

“…In nearly all mid-continent occurrences, fields of pimple mounds have been noted to overlie a dense subsoil pan (e.g., a Bt pan horizon "claypan," Bx horizon "fragipan," or other hardpan) or bedrock that limits rooting at shallow depth just below the intermound elevation (Branner, 1905;Purdue, 1905;Campbell, 1906;Koons, 1948;Knechtel, 1952;Melton, 1954;Ross et al, 1968;Jenny, 1980;Horwath and Johnson, 2006). (A claypan is a slowly permeable, compact horizon that has greater clay content than the horizons above and below, and a fragipan is a slowly permeable horizon that has a high bulk density and is rich in silt.…”

Section: Physical Setting Of Mound Fieldsmentioning

confidence: 99%

“…Although most mound fields were historically forested, pimple mounds were originally on almost all if not all prairie enclaves or "islands" within the forested region of Arkansas, Louisiana, Texas, Oklahoma, and Missouri (Hilgard, 1905;Campbell, 1906;Wackerman, 1929;Rich, 1934;Allgood and Gray, 1974;Foti, 1974;Collins, 1975), thus they are often called qprairie mounds." Like pimple mounds, prairie enclaves in mid-continent forests west of the Mississippi are closely associated with limited rooting zones and harsh growing conditions for trees (extreme growing season drought, waterlogged when wet, and sometimes high soil salinity) (Wackerman, 1929;Allred and Mitchell, 1955;Foti, 1974;Jenny, 1980;Sears, 1981;DeSelm, 1986).…”

Section: Physical Setting Of Mound Fieldsmentioning

confidence: 99%

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Relict nebkhas (pimple mounds) record prolonged late Holocene drought in the forested region of south-central United States

et al. 2009

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The origin and significance of pimple mounds (low, elliptical to circular dune-like features found across much of the south-central United States) have been debated for nearly two centuries. We cored pimple mounds at four sites spanning the Ozark Plateau, Arkansas River Valley, and Gulf of Mexico Coastal Plain and found that these mounds have a regionally consistent textural asymmetry such that there is a significant excess of coarse-grained sediment within their northwest flanks. We interpret this asymmetry as evidence of an eolian depositional origin of these mounds and conclude they are relict nebkhas (coppice dunes) deposited during protracted middle to late Holocene droughts. These four mounds yield optically stimulated luminescence ages between 2400 and 700 yr that correlate with well-documented periods of eolian activity and droughts on the southern Great Plains, including the Medieval Climate Anomaly. We conclude vegetation loss during extended droughts led to local eolian deflation and pimple mound deposition. These mounds reflect landscape response to multi-decadal droughts for the south-central U.S. The spatial extent of pimple mounds across this region further underscores the severity and duration of late Holocene droughts, which were significantly greater than historic droughts.

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Section: Edaphic Controlssupporting

confidence: 81%

Section: Physical Setting Of Mound Fieldsmentioning

confidence: 99%

Section: Physical Setting Of Mound Fieldsmentioning

confidence: 99%

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Relict nebkhas (pimple mounds) record prolonged late Holocene drought in the forested region of south-central United States

et al. 2009

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“…Allen and Anderson, 2000;Anderson et al, 2002). Such mounds also occupy portions of the fl oor of Pleistocene Lake Bonneville (Great Salt Lake), as along much of the western fringe of Logan, Utah, and near its airport (Campbell, 1906; personal observations; Janis Boettinger, 2011, personal commun.). Interstate-15 intersects a similar moundfi eld formed on low terraces of the Bear River several kilometers north of Brigham City, Utah (personal observations).…”

Section: Hybrid Mima Moundsmentioning

confidence: 98%

“…. (Campbell, 1906) The small fl at mounds beginning in the Iron Mountain neighborhood in Missouri, and extending southward into Texas and Louisiana, are inexplicable in our present state of knowledge. (Fowke, 1910) The small, low, fl attened mounds of the lower Mississippi Valley are a problem for archaeologists.…”

mentioning

confidence: 97%

Introduction: Overview of concepts, definitions, and principles of soil mound studies

Johnson

Burnham

2012

Mima Mounds: The Case for Polygenesis and Bioturbation

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This volume grew out of a symposium titled: "The origin of Mima mounds and similar micro-relief features: Multidisciplinary perspectives," and an associated similarly themed fi eld trip, both held at the Geological Society of America Annual Meetings, Houston, Texas, 4-9 October 2008. Five of the eight papers in that symposium were expanded for inclusion in this volume; with one nonsymposium paper added later (Johnson and Johnson, Chapter 6). The volume was invited and encouraged by the editors of GSA Special Papers to be one of their series. In regard to soil mounds, the symposium was timely for several reasons. The fi rst was, among the innumerable theories on how mounds form, evidence has gradually accumulated which confi rms that burrowing animals are involved. Involvements would seem to include (1) animals initiating the mounds themselves, where they begin as "activity centers" for basic living purposes (denning, reproduction, food storage, safety, etc.), which are actively bioturbated; (2) where landscape microhighs created by some physical or biological process, or both (e.g., coppicing), become occupied by animals for "activity centers," then augmented through bioturbation to create "hybrid mounds"; or (3) occupy soil-fi lled joints and fi ssures in otherwise thin soil or eroded bedrock areas. 1 In any of these three conditions we are concerned with the question: Would activity centers evolve into mounds, and perhaps persist wherever the centers confer living-survival-reproductive advantages to the animals that inhabit them? Since we examine mounds after they form, how can we tell, beyond theorizing, what the initial conditions were that led to mound formation? A purpose of the symposium, and this volume, was to revisit and examine these and other soil mound issues and questions, especially the role of life in landscape evolution. A second reason is the recent availabilities of useful analytical tools, such as LIDAR (light detection and ranging) and Google Earth technologies, allow new and different light to be shed on soil mound matters. In fact, they are revolutionizing studies of mounded landscapes. Third, bioturbation-and biomantle-related ideas and formulations on pedogenesis have appeared that are spawning different genetic understandings on how soils form and landscapes evolve

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Soil moisture regime and mound position effects on soil profile properties in a native tallgrass prairie in northwest Arkansas, USA

et al. 2019

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Natural Mounds

Cited by 7 publications

References 0 publications

Relict nebkhas (pimple mounds) record prolonged late Holocene drought in the forested region of south-central United States

Relict nebkhas (pimple mounds) record prolonged late Holocene drought in the forested region of south-central United States

Introduction: Overview of concepts, definitions, and principles of soil mound studies

Soil moisture regime and mound position effects on soil profile properties in a native tallgrass prairie in northwest Arkansas, USA

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