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Treptichnus pedum

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Journal Article
Published: 22 August 2017
Geological Magazine (2018) 155 (1): 174–180.
...LUIS A. BUATOIS Abstract The Ediacaran–Cambrian (E-C) boundary is based on the first appearance of the ichnofossil Treptichnus pedum . Investing an ichnotaxon with such biostratigraphic pre-eminence has been the focus of criticism. Points of contention have revolved around four main issues: (1...
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Journal Article
Journal: Geology
Published: 01 April 2013
Geology (2013) 41 (4): 519–522.
...Luis A. Buatois; John Almond; Gerard J.B. Germs Abstract The Ediacaran-Cambrian boundary, arguably the most important in the stratigraphic column, is based on the first appearance of the ichnospecies Treptichnus pedum . However, most trace fossils have long temporal ranges and occur in a narrow...
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Journal Article
Journal: PALAIOS
Published: 01 April 2012
PALAIOS (2012) 27 (4): 252–273.
... Treptichnus pedum. Facies analysis shows that T. pedum is closely linked to a nearshore sandstone deposit, indicating a close environmental or taphonomic connection to very shallow, mud-draped sandy seafloor swept by tidal currents. Facies restriction may limit the biostratigraphic potential of T. pedum...
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Journal Article
Published: 12 September 2017
Journal of Paleontology (2017) 91 (6): 1178–1198.
..., containing Helminthoidichnites tenuis , Helminthopsis tenuis , and Cochlichnus anguineus , is early Fortunian based on small shelly fossils, and is interpreted as a distal expression of the Treptichnus pedum zone. Ichnozone 2, comprising the first occurrence of T . pedum , is middle Fortunian, and is best...
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Morphology of  <b>Treptichnus</b> <b>pedum</b> . (a) Specimen from the type locality. Nob...
Published: 22 August 2017
Figure 1. Morphology of Treptichnus pedum . (a) Specimen from the type locality. Nobulus Shale, lower Cambrian, Salt Range, Pakistan. Specimen housed at the Palaeontological Collection, Geologisches Institut, University of Tübingen, Germany. (b) Klipbak Formations, Brandkop Subgroup, lower
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Size distributions of  Planolites  from the  <b>Treptichnus</b> <b>pedum</b>  and  Rusoph...
Published: 01 March 2014
Figure 2 Size distributions of Planolites from the Treptichnus pedum and Rusophycus avalonensis zones of the three study areas.
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Bedding plane bioturbation indices (BPBI) from the  <b>Treptichnus</b> <b>pedum</b>  and ...
Published: 01 March 2014
Figure 3 Bedding plane bioturbation indices (BPBI) from the Treptichnus pedum and Rusophycus avalonensis zones of the three study areas. Numbers in the pie charts show the percentages of bedding planes that are classified under each bioturbation index. Upper left, Torrowangea isp. from
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Examples of  <b>Treptichnus</b> <b>pedum</b>  in Fortunian units of Vanrhynsdorp Group (S...
in > Geology
Published: 01 April 2013
Figure 1. Examples of Treptichnus pedum in Fortunian units of Vanrhynsdorp Group (South Africa). All scale bars are 1 cm long. A: Specimen showing classic branching pattern, from upper offshore deposits, Klipbak Formation. B: Specimen showing looping, from upper offshore deposits, Klipbak
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<b>Treptichnus</b> <b>pedum</b>  response curve based on occurrences in Vanrhynsdorp Grou...
in > Geology
Published: 01 April 2013
Figure 3. Treptichnus pedum response curve based on occurrences in Vanrhynsdorp Group (South Africa). A: Wave-dominated shallow-marine clastic gradient. Ab—absent; A—abundant (more than 30 specimens); C—common (30–5); R—rare (fewer than 5). B: Tide-dominated shallow-marine clastic gradient.
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<b>Treptichnus</b> <b>pedum</b> preserved on sandstone bed soles. A–B) Specimen with curv...
in > PALAIOS
Published: 01 April 2012
F igure 12— Treptichnus pedum preserved on sandstone bed soles. A–B) Specimen with curved portions in which the segments project outwards, resulting in an appearance that has been compared to a crosier. C, D, F) Specimens in which vertically oriented portions are preferentially preserved. E
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<b>Treptichnus</b> <b>pedum</b> preserved on sandstone bed soles. A–D) Curved specimens s...
in > PALAIOS
Published: 01 April 2012
F igure 13— Treptichnus pedum preserved on sandstone bed soles. A–D) Curved specimens showing differences in the spacing of vertical probes. Note zigzag development of burrow in upper part of C. E–F) Specimens largely preserved as disjunct probes, in places showing a three-lobed basal surface.
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<b>Treptichnus</b> <b>pedum</b> preserved on sandstone bed soles, with examples of specim...
in > PALAIOS
Published: 01 April 2012
F igure 14— Treptichnus pedum preserved on sandstone bed soles, with examples of specimens with a three-lobed basal surface and narrow lateral lobes with a fine transverse ornamentation. E is a close-up of central area in D. G shows burrow segments in upper part of F with a different orientation
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A–C) Top surface of sandstone bed covered with <b>Treptichnus</b> <b>pedum</b> preserved ...
in > PALAIOS
Published: 01 April 2012
F igure 15— A–C) Top surface of sandstone bed covered with Treptichnus pedum preserved as grooves. B is a close-up of top area in A. Hammerhead in A is 24 mm wide. Furrows in C are about 5 mm wide.
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Figure 3. A:  <b>Treptichnus</b> <b>pedum</b>  on base of sandstone bed, Early Cambrian M...
in > Geology
Published: 01 February 2000
Figure 3. A: Treptichnus pedum on base of sandstone bed, Early Cambrian Mickwitzia sandstone member, File Haidar Formation, Lugnås, Västergötland, Sweden (Sedgwick Museum, Cambridge, x29339). Scale bar = 10 mm. B, C: Change in morphology of trepthichnid as result of lowering plane
Journal Article
Published: 01 March 2001
Geological Magazine (2001) 138 (2): 213–218.
...JAMES G. GEHLING; SÖREN JENSEN; MARY L. DROSER; PAUL M. MYROW; GUY M. NARBONNE Abstract The range of Treptichnus pedum , the index trace fossil for the Treptichnus pedum Zone, extends some 4 m below the Global Standard Stratotype-section and Point for the base of the Cambrian Period at Fortune...
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... in carbonate and mixed carbonate-siliciclastic deposits. The first burrows with spreiten and complex branching, designated as the Phycodes (Treptichnus) pedum Zone, delineate the base of the Cambrian. This zone overlies the uppermost Neoprotero-zoic Harlaniella podolica Zone and is composed of relatively...
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Journal Article
Journal: PALAIOS
Published: 01 February 2002
PALAIOS (2002) 17 (1): 3–15.
...–Cambrian boundary stratotype. Gyrolithes , Planolites , and Skolithos occur as sand infills ubiquitously throughout siltstone beds, most commonly without direct contact with an overlying sandstone bed, as if “floating” in the siltstone. In contrast, Treptichnus pedum occurs as sand infills adhering onto...
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Journal Article
Published: 01 March 2014
Journal of Paleontology (2014) 88 (2): 331–338.
...Figure 2 Size distributions of Planolites from the Treptichnus pedum and Rusophycus avalonensis zones of the three study areas. ...
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Series: Geological Society, London, Special Publications
Published: 01 January 2014
DOI: 10.1144/SP395.8
EISBN: 9781862396715
... define a GSSP for a stage of human development or even the base of the Anthropocene. Abstract The base of the Cambrian System is recognized by a characteristic (marine) trace fossil suite assigned to the Treptichnus pedum Biozone, which signals increasing complexity of animal behaviour...
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Journal Article
Journal: Geology
Published: 01 July 1999
Geology (1999) 27 (7): 625–628.
...Mary L. Droser; James G. Gehling; Sören Jensen Abstract Studies of sedimentary fabrics and trace fossils across the Precambrian-Cambrian interval in South Australia demonstrate that the appearance of Treptichnus pedum , which defines the base of the Cambrian, also marks the initial development...