NDLTD logo NDLTD Union Catalog and Global ETD Search

Global ETD Search

Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.

Results

Showing 1 to 20 of 34 for “"fossil assemblages"”.

  1. Quantitative Ecological and Taphonomic Patterns in Late Cenozoic Mollusk-Dominated Marine Fossil Assemblages

    Barbour Wood, Susan L.Virginia Tech2006

    … is such research limited to working solely on fossil data. Actualistic paleontology is the study of modern or recent organisms and processes to better understand those of the past. The bulk of this body of research falls under the category of actualistic paleontology, and examines …

    vt Repository record

  2. Quantitative Studies of Late Neogene Coastal Environments Using Bivalve Subfossil and Fossil Assemblages

    Stempien, Jennifer AnneVirginia Tech2006

    … there will always be some bias inherent to the fossil record. This bias has been often viewed as a negative aspect, undermining the utility of paleontological data for retrieving ecological and environmental records. Yet, fossils are still one of the best sources of direct data about the past …

    vt Repository record

  3. Time-Averaging and Morphology: Variability in Modern Populations and Fossil Assemblages of Mercenaria (Bivalvia)

    Bush, Andrew MiltonVirginia Tech1999

    The morphologic variability of a fossil assemblage is of interest in many paleontological studies. However, many fossil assemblages are time-averaged; that is, many generations of non-contemporaneous organisms are mixed into the same fossil bed. Assemblages of robust mollusk shells deposited in …

    vt Repository record

  4. Community persistence and the pattern of community variability over time: a test using fossil assemblages from four marine transgressions in the Breathitt Formation (Middle Pennsylvanian) of Eastern Kentucky

    Bennington, J. BretVirginia Tech1995

    … and Stoney Fork, were measured, sampled for fossils, and described. Each marine interval was shown to be the product of a single episode of transgression and regression that led to the establishment of a variety of marine habitats in the central Appalachian basin. These habitats included …

    vt Repository record

  5. Prey Selectivity by naticid gastropods from tertiary sediments of the United States coastal Plain

    Sickler, Robert N.

    … (Vermeij, 1987). Naticid predation on molluscan assemblages is one of several examples used to support the hypothesis of escalation. </p><p>Three Oligocene bivalve prey species, Astarte triangulata (547 specimens), Corbula rufaripa (2186 specimens), and Scapharca invidiosa (506 specimens), from …

    nodak Repository record

  6. Human-rainforest interactions in Island Southeast Asia: Holocene vegetation history in Sarawak (Malaysian Borneo) and Palawan (western Philippines)

    O'Donnell, Shawn AldenUniversity of Cambridge2016

    … over the past ~5000 years. Interpretation of fossil pollen data relies upon uniformitarian principles. Few modern pollen- vegetation studies from the region exist, and those that do have focused on climatic or ecological aims. Main contributions of this study are: the collection and analysis …

    cambridge Repository record

  7. New research methods for the analysis of fossil Anura ilia and their utility for reconstructing the palaeoenvironment of Swartkrans Cave

    Brand, RuanDepartment of Archaeology2023

    Anura fossils are relatively common amongst microfauna assemblages but remain largely unanalysed because of a lack of expertise. This is unfortunate since Anura are effective indicators of environmental conditions as their life cycles and breeding patterns are integrally linked with temperature and …

    cape-town Repository record

  8. The fate of leaves in south eastern Australian terrestrial and aquatic environments: implications for taphonomic bias in the tertiary macrofossil record

    Steart, David CharlesVictoria University of Technology2003

    … processes that form and possibly bias plant fossil assemblages is of central importance to understanding and interpreting some of the anomalies in the Australian Cenozoic plant fossil record. This study measured a variety of ecosystem processes in contiguous Nothofagus cunninghamii (Hook) …

    vu-aus Repository record

  9. Cyanobacterial evolution and interactions with the Proterozoic world

    Moore, Kelsey Reed.Massachusetts Institute of Technology2020

    … and some exceptionally well-preserved microbial fossils from the Proterozoic (2500 to 540 million years ago). Some of these exceptional fossils are identifiable as cyanobacteria that were preserved by pyrite, amorphous silica (SiO₂) and other minerals. Although a record exists of these organisms, …

    mit Repository record

  10. Ichnotaxonomic assessment of Mazon Creek area trace fossils, Illinois, USA

    LoBue, David J.University of Kansas2010

    … preserved within siderite concretions. Trace fossils, though less well known, also occur in concretions. Several hundred trace-fossil-bearing concretions were examined from collections at The Field Museum, Chicago, and The University of Kansas Natural History Museum, Lawrence. Identification …

    ku Repository record

  11. Paleomagnetic and Rock Magnetic Analysis of Upper Cretaceous Synorogenic Conglomerates From the Cordilleran Foreland Basin, Utah; Middle Triassic Moenkopi Formation From the Petrified Forest National Park, Arizona; and Pseudotachylytes From the Albany-Fraser Orogenic Belt, Southwest Australia

    Haque, Ziaul2022

    … richest non-marine macrofloral and vertebrate fossil assemblages from the whole of North America, and a robust age constraint of this sequence is important to estimate the ages of its constituent fossil assemblages, document key biotic events, and for lithologic and biostratigraphic correlation …

    tdl Repository record

  12. Paleoenvironmental analysis of a late Holocene deposit : Stanton site, west-central North Dakota

    Fischer, David W.

    … years B.P.</p> <p>Abundant well-preserved fossils are present in the organic sediments of the Stanton Site, A molluscan assemblage from a measured section consists of 2 species of sphaeriid bivalves, 6 species of aquatic snails, and 8 species of terrestrial snails, including Stagnicola …

    nodak Repository record

  13. High-Resolution Correlation of a Time-Bounded Unit of the Pisco Formation, Peru

    O'Hare, Daniel J.

    … vertical and lateral variability in lithology, fossil assemblages, structures, and sequences was examined in detail and used to develop a paleoenvironmental model of the time-bounded sequence. Six distinct facies from the Pisco Formation were defined and used toward developing the …

    loma-linda Repository record

  14. FORAMINIFERAL DISTRIBUTION AND SEQUENCE STRATIGRAPHY OF OXFORDIAN SUCCESSIONS IN THE WESSEX/ANGLO-PARIS BASIN

    OXFORD, MELISSA JANE2004

    … the importance of the preservation upon the fossil assemblages recovered and how this can influence the establishment of biozones.

    plymouth Repository record

  15. Faunal variation and its potential for sampling bias in the Morgarts Beach Member of the Yorktown Formation (Pliocene)

    Crowell, MarkVirginia Tech1988

    … statistical study was performed on molluscan fossil assemblages collected from the Pliocene Morgarts Beach Member of the Yorktown Formation, located in Isle of Wight County, southeast Virginia. The principal objectives of this study were to examine potential sampling problems and biases …

    vt Repository record

  16. Diagnosing Bone Fracture to Assess Early Hominin Behaviour, Meat-Eating, and Socioecology at FLK-Zinjanthropus, Olduvai Gorge, Tanzania

    Oliver, JSLiverpool John Moores University2015

    … tool and tooth marks in Oldowan (2.5-1.8mya) fossil assemblages. Consequently, estimating hominin and carnivore involvement is difficult, and questions remain about Oldowan hominin’s position in the carnivore guild and socioecology. One aspect of bone damage, fracture surfaces, is ubiquitous, …

    liverpool-jm Repository record

  17. Paleoecology of a late quaternary biota at the McClusky Canal Site, central North Dakota

    Okland, Linda E.

    <p>Abundant and well-preserved Late Quaternary fossils were exposed at the McClusky Canal Site in the Missouri Coteau district of central North Dakota during the late summer and fall of 1976. Strati graphic units, in ascending order, are: (l) pebbly, clayey sand; (2) unlaminated, organic claystone; …

    nodak Repository record

  18. The contemporary distribution of benthic foraminifera in the Pearl River estuary, southeast China, and their use in reconstructing mid‐ to late‐Holocene fluvial flux

    Garrett, EdmundDurham University2010

    … ordination suggest a link between foraminiferal assemblages and the magnitude of fluvial influence. Constrained ordination links the faunal data to recognised environmental gradients and highlights salinity as the most important factor in controlling species distributions. Transfer function …

    durham Repository record

  19. Exceptional Preservation and Bias in the Fossil Record

    Hawkins, Andrew DonaldVirginia Tech2017

    … and on potential source of bias in the fossil record. The occurrence of exceptionally preserved fossil assemblages and the existence of systematic bias in the fossil record from a variety of sources represent opposing forces acting on the information quality of the fossil record. …

    vt Repository record

  20. Sedimentology of the Catalina Dome and taxonomy of Mistaken Point small fronds

    Mason, Sara2013

    … descriptions of the small, stemmed frondose fossils at Mistaken Point on the Avalon Peninsula. Sedimentological study of the upper Conception and lower St. John's groups at Catalina Dome on Bonavista Peninsula extends our understanding of the Conception Basin, in which the oldest known …

    queens Repository record

Page 1 of 2