Brian Frederic Platt

Brian Frederic Platt
University of Mississippi | UM · Department of Geology and Geological Engineering

PhD

About

102
Publications
16,832
Reads
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523
Citations
Additional affiliations
August 2013 - present
University of Mississippi
Position
  • Professor (Assistant)
August 2012 - December 2012
University of Kansas
Position
  • Lecturer
August 2012 - August 2013
Kansas Geological Survey
Position
  • PostDoc Position

Publications

Publications (102)
Article
Full-text available
The nine-banded armadillo (Dasypus novemcinctus) is a well known burrower, but individuals spend the majority of their time above ground foraging for soil organisms by repeatedly digging pits through the soil surface. Little ichnological attention has been given to these foraging pits even though their great prevalence within the geographic range o...
Article
Full-text available
We observed trace-making behaviors of one female African elephant (Loxodonta africana) and one female Asian elephant (Elephas maximus) in a zoo setting. Our objective was to document uncommonly studied traces, that is, traces other than dung and footprints in sediments, so that paleoichnological researchers may benefit from a broader search pattern...
Article
We performed a series of neoichnological experiments with elephants to investigate the relationship between the various factors involved in controlling megafaunal footprint formation. Our ultimate goal was to provide a means to calculate original sedimentary properties of fossil-footprint–bearing siliciclastic rocks, especially those containing sau...
Article
Full-text available
Interpretation of paleosols involves deciphering the complex interplay between multiple biotic and abiotic processes. Previous ichnological research has shown that trace fossils, which record biotic influences on pedogenesis, are particularly useful for reconstructing physicochemical conditions during soil formation, which, in turn, can yield impor...
Article
Full-text available
The purpose of this paper is to test the application of a new, low-cost ($2995.00 US), multistripe laser triangulation (MLT) scanner and three-dimensional (3D) software for semiquantitative and quantitative analyses of ichnofossils and modern traces. The goal of this research is to improve on existing analytical techniques and apply new methods to...
Article
The Eocene Tallahatta Formation forms part of the Tallahatta-Winona aquifer, which is part of the lower Claiborne confining unit of the Mississippi Embayment. A thorough understanding of the distribution of natural resources within the Tallahatta is limited by a lack of detailed studies at the outcrop and pore scales. In this study, we integrate pa...
Article
The Chesterian (Mississippian) Hartselle Sandstone is a tar sand exposed in the Black Warrior Basin and southern Appalachian fold belt in northern Mississippi and Alabama. Previous studies disagree about the delivery direction and relative contributions of sediment from the cratonic interior, the Appalachians, and the Ouachitas. The goal of this re...
Article
Full-text available
We provide new detrital zircon evidence to support a Maastrichtian age for the establishment of the present-day Mississippi River drainage system. Fieldwork conducted in Pontotoc County, Mississippi, targeted two sites containing montmorillonitic sand in the Maastrichtian Ripley Formation. U-Pb detrital zircon (DZ) ages from these sands (n = 649) r...
Article
Full-text available
Trace fossil zonation in the Hartselle Sandstone of Mississippian age (Chesterian: Visean-Serpukhovian) exposed on Fielder Ridge, Alabama is compared with modern macro-tidal flat ichnocoenoses on the Bay of Fundy at Lubec, Maine, and demonstrated to be analogous by sedimentologic and ichnotaxonomic criteria. The modern flat has minimal influence from...
Conference Paper
Full-text available
A large tidal flat at Lubec, Maine extends for more than a kilometer at low tide. Tide ranges from 7 to 8 meters depending on lunar phase and time of year. The elevation gradient increases monotonically towards the beach where the flat is bound by a steep gradient to the shoreline. Surface sediments are heterogeneous, ranging from coarse gravel to...
Article
Full-text available
LIDAR-based analyses of the first theropod dinosaur trackways known from the state of Arkansas, USA are reported. The trackways were found on a limestone bedding plane in the Albian De Queen Formation in an active gypsum quarry. Because limited access precluded thorough field study, fieldwork focused on preserving the entire site digitally with gro...
Data
Tridactyl trackway measurements. (XLSX)
Data
Tridactyl track parameters for determine theropod vs. ornithopod origin. See Fig 9a for illustration of track parameters. (XLSX)
Data
Estimates of hip heights and speeds of tridactyl trackmakers. Hip heights are calculated as FLT multiplied by 4 [50]; speeds are calculated according to [51]. (XLSX)
Data
Trackway orientations. Measured by protractor on the hillshade relief map generated from LIDAR data. (XLSX)
Data
Tridactyl track measurements. See Fig 2 for additional explanation. (XLSX)
Article
Whereas soils in semiarid environments have received considerable attention, specific biogenic structures produced by the plants and animals that inhabit them are less well understood. Soils in a field site in the Santa Catalina Critical Zone Observatory in the semiarid Sonoran Desert of southern Arizona were investigated to develop a model to impr...
Article
Full-text available
Recent drilling in southwestern Kansas has produced intact cores to investigate the subsurface lithostratigraphy, sedimentary provenance, and chronostratigraphy of strata constituting the central High Plains Aquifer (HPA). In large portions of the HPA, groundwater withdrawals greatly exceed rates of recharge, leading to dramatic-water level decline...
Conference Paper
The purpose of this ongoing project is to record soil and neoichnological properties in a field setting with the infrastructure to quantify variables that correspond to the five soil-forming factors (climate, organisms, relief, parent material, and time). Burrow properties can then be related to climatic and environmental parameters to produce math...
Article
Soil-disturbing vertebrates (SDV) are relatively low in biodiversity and biomass compared with the dominant soil fauna (microorganisms and invertebrates), but they can nevertheless have a great impact on the physical and chemical properties of soils. Our goal is to take an ichnological (organism-substrate interactions)–based approach to review the...
Chapter
Advancements in three-dimensional (3D) digital surface scanning have opened up the possibility of capturing soil morphological information from irregular objects in high resolution. One of these advancements has been the development of a multistripe laser triangulation (MLT) technique that sweeps a series of laser stripes across a surface, while a...
Article
Full-text available
Point of Rocks, a high-relief bluff overlooking the Cimarron River valley in Morton County, Kansas, is capped by distinct white beds of Neogene Ogallala Formation calcrete that overlie red beds of shale, siltstone, and sandstone. These unfossiliferous red beds are currently assigned to the Jurassic System; however, their age has long been debated d...
Conference Paper
Full-text available
A prominent bluff in extreme southwest Kansas, Point of Rocks, was one of the best-known landmarks for 19th-century travelers on the Santa Fe Trail because it signaled proximity to natural springs in a long stretch with few sources of water. Point of Rocks is capped by distinct white beds of Neogene Ogallala Formation calcrete that overly beds of r...
Conference Paper
The long-term goal of this study is to examine a wide range of modern soils and associated biota to develop a model to interpret analogous paleosols and trace fossils in the geologic record. Few studies have examined the biogenic modification of mountain soils. While such soils may be geologically fleeting, several factors make them worth studying....
Conference Paper
Full-text available
The Neogene Ogallala Formation consists of discontinuous beds of conglomerate, sandstone, and siltstone composed of sediment eroded from the Rocky Mountains and deposited as a broad, eastward-thinning clastic wedge in the High Plains region of the United States. Outcrops of the Ogallala Formation in western Kansas have long been recognized for resi...
Conference Paper
Full-text available
This study presents a simple and effective approach of characterizing shallow subsurface anomalies in ground-penetrating radar (GPR) images. Using a dense grid of high-resolution (GX750 MHz) GPR surveys of pocket gopher burrow networks along a soil-covered mountain slope, Oracle Ridge, southern Arizona. Shallow excavations were used to groundtruthe...
Conference Paper
Full-text available
The McPherson Channel is a paleovalley underlying south central Kansas and contains undifferentiated alluvial, eolian, and fluvial sediments speculated to be Pleistocene and younger in age. These deposits comprise the primary water-bearing units of the Equus Beds Aquifer and are the easternmost extension of the High Plains Aquifer in Kansas. Equus...
Article
Fractal models that describe the distribution of aggregate mass and the hierarchical organization of soil structure at scales relevant to hydrological processes have been tested only over a small range of aggregate sizes. The objectives of this work were to extend to the decimeter-scale the range of aggregate diameters used in mass–volume investiga...
Conference Paper
The Kansas Geological Survey (KGS) is conducting an ongoing project describing and mapping sediments within the McPherson Channel, a paleovalley underlying Harvey and McPherson Counties in south central Kansas. Channel deposits are considered the easternmost extension of the High Plains Aquifer system in Kansas and a source for agricultural waters...
Conference Paper
Full-text available
Calcic paleosols occur with high stratigraphic frequency in the Ogallala Formation and are characterized by abundant carbonate nodules and root traces, and thick paleophreatic calcretes. Honeycomb-like structures common to some calcretes have been attributed to algal structures, rhizoliths, or as recent dissolution features. These structures are pr...
Conference Paper
The calcretes of the Neogene Ogallala Formation of western Kansas have long been known for their distinctive weathering pattern, which is heavily influenced by abundant trace fossils preserved by carbonate-cemented sand. Ogallala calcretes are of interest because their low permeability potentially influences groundwater hydrology in the subsurface....
Article
Full-text available
Quantitative determination of calcite/dolomite ratios in soil carbonate fractions is important for understanding the pedogenic history of a soil or paleosol. This is particularly relevant to stable carbonate-carbon and -oxygen isotope analyses where the presence of dolomite in a carbonate fraction can lead to erroneous results and inaccurate interp...
Chapter
Full-text available
Actualistic studies of modern continental environments and the spatial and temporal distribution of terrestrial and aquatic organisms are summarized and synthesized to understand how to better interpret the significance of trace fossils to differentiate lacustrine from fluvial, eolian, and marine deposits in the geologic record. The purpose of this...
Conference Paper
The Kansas Geological Survey (KGS) is carrying out a multi-year geologic mapping project focusing on a priority hydrogeologic unit in south-central Kansas known as the “Equus Beds” aquifer. The Equus Beds are considered the easternmost extension of the High Plains aquifer system in Kansas and are composed of currently undifferentiated fluvial, allu...
Conference Paper
Full-text available
Recently described ant-nest ichnofossils from the Neogene Ogallala Formation were identified through comparisons to casts of modern ant nests (Hymenoptera: Formicidae). To expand the database of known modern ant-nest architectures, we collected a cast of a western harvester ant (Pogonomyrmex occidentalis) nest during a field trial in Ellis County,...
Conference Paper
The Neogene Ogallala Formation in the high plains region is well known for its characteristic honeycomb-weathering pattern resulting from the juxtaposition of erosive siltstone and sandstone and resistant calcretes. Our previous research in the Ogallala in western Kansas showed that many prominent weathering patterns are controlled by carbonate-cem...
Article
Full-text available
Two new ant-nest trace fossils are described from calcic sandy paleosols of the Neogene Ogallala Formation in western Kansas. The ichnofossils are preserved within and below calcrete beds weathering in positive relief as carbonate-filled casts or as cavities in negative relief. Daimoniobarax ichnogenus nov. is established for burrow systems compose...
Conference Paper
Full-text available
A new, low‐cost multistripe laser triangulation (MLT) scanner and three‐dimensional (3D) editing software were used to semiquantitatively and quantitatively analyze a variety of modern traces and continental and marine ichnofossils. The purpose of this study is to enhance existing ichnological techniques and apply newly developed analytical methods...
Conference Paper
Recent development of multistripe laser triangulation (MLT) scanners have made digitizing three-dimensional, irregular pedogenic and ichnologic bodies such as ped structures and casts of endogenic and exogenic traces possible at a fraction of the cost of conventional LiDAR systems. These new applications have opened the door to such novel and no...
Conference Paper
Full-text available
Calcic paleosols in the Ogallala Formation are characterized by carbonate nodules, root traces, and thick paleophreatic calcretes. Ant nest ichnofossils composed of vertically tiered, horizontally oriented pancake-shaped chambers connected by vertical, small-diameter shafts are preserved within and below calcrete beds as CaCO3-filled casts weatheri...
Conference Paper
Bioturbation, which results from burrowing and trampling by fauna, influences the rates of pedogenesis, surface stability, and soil geomorphology. As biota is one of the five soil-forming factors, the study of the abundance, morphologies, and roles of animal, plant, and microbial traces in pedogenesis is important. Tracks and burrows left by animal...
Conference Paper
Full-text available
We used a relatively new, low-cost multistripe laser triangulation (MLT) scanner and three-dimensional (3D) editing software for a range of semiquantitative and quantitative analyses of ichnofossils and modern traces. Our goal is to improve on existing ichnological techniques and apply newly developed analytical methods. We scanned and created 3D d...