1-20 OF 205 RESULTS FOR

Treptichnus pedum

Results shown limited to content with bounding coordinates.
Save search
Follow your search
Access your saved searches in your account
Would you like to receive an alert when new items match your search?
Close Modal
Sort by
Journal Article

Treptichnus pedum and the Ediacaran–Cambrian boundary: significance and caveats Available to Purchase

LUIS A. BUATOIS
Published: 22 August 2017
Geological Magazine (2018) 155 (1): 174–180.
DOI: https://doi.org/10.1017/S0016756817000656
...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...
FIGURES
View PDF for article title, <span class="search-highlight">Treptichnus</span> <span class="search-highlight">pedum</span> and the Ediacaran–Cambrian boundary: significance and caveats
Purchase
Add to Citation Manager for <span class="search-highlight">Treptichnus</span> <span class="search-highlight">pedum</span> and the Ediacaran–Cambrian boundary: significance and caveats
Journal Article

Environmental tolerance and range offset of Treptichnus pedum : Implications for the recognition of the Ediacaran-Cambrian boundary Available to Purchase

Luis A. Buatois, John Almond, Gerard J.B. Germs
Journal: Geology
Published: 01 April 2013
Geology (2013) 41 (4): 519–522.
DOI: https://doi.org/10.1130/G33938.1
...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...
FIGURES
View PDF for article title, Environmental tolerance and range offset of <span class="search-highlight">Treptichnus</span> <span class="search-highlight">pedum</span> : Implications for the recognition of the Ediacaran-Cambrian boundary
Purchase
Add to Citation Manager for Environmental tolerance and range offset of <span class="search-highlight">Treptichnus</span> <span class="search-highlight">pedum</span> : Implications for the recognition of the Ediacaran-Cambrian boundary
Journal Article

DEEP-WATER INCISED VALLEY DEPOSITS AT THE EDIACARAN-CAMBRIAN BOUNDARY IN SOUTHERN NAMIBIA CONTAIN ABUNDANT TREPTICHNUS PEDUM Available to Purchase

JONATHAN P. WILSON, JOHN P. GROTZINGER, WOODWARD W. FISCHER, KEVIN P. HAND, SÖREN JENSEN, ANDREW H. KNOLL, JOHN ABELSON, JOANNAH M. METZ, NICOLA MCLOUGHLIN, PHOEBE A. COHEN, MICHAEL M. TICE
Journal: PALAIOS
Published: 01 April 2012
PALAIOS (2012) 27 (4): 252–273.
DOI: https://doi.org/10.2110/palo.2011.p11-036r
... 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...
FIGURES | View All (21)
View PDF for article title, DEEP-WATER INCISED VALLEY DEPOSITS AT THE EDIACARAN-CAMBRIAN BOUNDARY IN SOUTHERN NAMIBIA CONTAIN ABUNDANT <span class="search-highlight">TREPTICHNUS</span> <span class="search-highlight">PEDUM</span>
Purchase
Add to Citation Manager for DEEP-WATER INCISED VALLEY DEPOSITS AT THE EDIACARAN-CAMBRIAN BOUNDARY IN SOUTHERN NAMIBIA CONTAIN ABUNDANT <span class="search-highlight">TREPTICHNUS</span> <span class="search-highlight">PEDUM</span>
Image
Complex burrowing traces from Chicago Pass. A) Treptichnus pedum (Spec. ID: CP.511-LT3). B) Unidentified treptichnid (Spec. ID: CP.481.6-LT1). C) Treptichnus bifurcus (Spec ID: CP.481.2-LT1). D) Cross-section view of C showing burrow troughs and infilled burrows. E) Cross-section of Lamonte trevallis containing specimen (Spec. ID: CP.428.1-LT1). F) Thin-section of stacked L. trevallis (Spec. ID: CP.511-LT1). G) Arthropod scratches (Spec ID: CP.481.2-LT1). Black scale = 1 cm, white scale = 1 mm.

Complex burrowing traces from Chicago Pass. A ) Treptichnus pedum (Spec.... Available to Purchase

Published: 29 December 2022
Fig. 6 Complex burrowing traces from Chicago Pass. A ) Treptichnus pedum (Spec. ID: CP.511-LT3). B ) Unidentified treptichnid (Spec. ID: CP.481.6-LT1). C ) Treptichnus bifurcus (Spec ID: CP.481.2-LT1). D ) Cross-section view of C showing burrow troughs and infilled burrows. E ) Cross
Image
Variations in Treptichnus pedum preservation in relation to different types of outcrop exposure. Scale bars are 1 cm. (a) Bed base with segments extending laterally on a flat, well exposed surface. Positive hyporelief, Grand Bank Head, M2A. (b) Oblique weathering of a bed top displaying sickle-like segments extending laterally and obliquely (white arrows). Note that thin mudstone laminae are progressively weathered on the surface (yellow arrows), revealing the Treptichnus morphology. Full relief, Lewin’s Cove, M2A. (c) Vertical exposure (i.e., cross-sectional view) displaying four aligned individual segments cut transversally. This type of preservation is rarely encountered in the CIF. Full relief, Point May, M2B. (d) Line drawing of (c) showing that only the lateral part of Treptichnus segments is visible on the rock surface.

Variations in Treptichnus pedum preservation in relation to different typ... Available to Purchase

Published: 23 December 2022
Fig. 5. Variations in Treptichnus pedum preservation in relation to different types of outcrop exposure. Scale bars are 1 cm. ( a ) Bed base with segments extending laterally on a flat, well exposed surface. Positive hyporelief, Grand Bank Head, M2A. ( b ) Oblique weathering of a bed top
Image
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 Cambrian, near Brandkop, South Africa. Field photograph. (c) Lower Bright Angel Shale, middle Cambrian, Indian Gardens, AZ, USA. Specimen housed at the Palaeontological Collection, Geologisches Institut, University of Tübingen. Scale bars are 1 cm.

Morphology of Treptichnus pedum . (a) Specimen from the type locality. Nob... Available to Purchase

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
Image
Size distributions of Planolites from the Treptichnus pedum and Rusophycus avalonensis zones of the three study areas.

Size distributions of Planolites from the Treptichnus pedum and Rusoph... Available to Purchase

Published: 01 March 2014
Figure 2 Size distributions of Planolites from the Treptichnus pedum and Rusophycus avalonensis zones of the three study areas.
Image
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 the Member 2 (142 m above the base of the Member 2), T. pedum Zone, Newfoundland; upper right, Taphrhelminthopsis isp. and Planolites isp. from the Member 2 (275 m above the base of the Member 2), Newfoundland; middle left, Planolites isp. from the Member 18 (34 m above the base of the Member 18), T. pedum Zone, Gobi-Altai; middle right, Planolites isp. from float derived from the Member 20, R. avalonensis Zone, Gobi-Altai; lower left, Planolites isp. from the Lower Phosphate Member (60 cm below from the top of the Member), T. pedum Zone, Meishucun. All scale bars=5 cm.

Bedding plane bioturbation indices (BPBI) from the Treptichnus pedum and ... Available to Purchase

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
Image
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 Formation. C: Long and winding specimens from lower intertidal deposits, Kalk Gat Formation.

Examples of Treptichnus pedum in Fortunian units of Vanrhynsdorp Group (S... Available to Purchase

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
Image
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.

Treptichnus pedum response curve based on occurrences in Vanrhynsdorp Grou... Available to Purchase

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.
Image
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) Close-up of small specimen in lower right portion of image C. G) Two different-sized specimens. Note, however, the thin burrow connecting vertical portions in the larger specimen, which suggests that the width of the vertical portions may have little bearing on the diameter of the producer.

Treptichnus pedum preserved on sandstone bed soles. A–B) Specimen with curv... Available to Purchase

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
Image
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.

Treptichnus pedum preserved on sandstone bed soles. A–D) Curved specimens s... Available to Purchase

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.
Image
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 (rotated 180°). Insets in B and G are highlighted details.

Treptichnus pedum preserved on sandstone bed soles, with examples of specim... Available to Purchase

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
Image
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.

A–C) Top surface of sandstone bed covered with Treptichnus pedum preserved ... Available to Purchase

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.
Image
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 of intersection (preservation) between trace fossil and base of preserving bed, simulated by pressing Plasticine onto trace in A (less pressure in C) and casting molds with plaster. Note that trace becomes increasingly discontinuous and that some probes are lost, increasing similarity with treptichnids from Huns Member. Scale bars = 10 mm.

Figure 3. A: Treptichnus pedum on base of sandstone bed, Early Cambrian M... Available to Purchase

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

Ichnostratigraphy of the Ediacaran-Cambrian boundary: new insights on lower Cambrian biozonations from the Soltanieh Formation of northern Iran Available to Purchase

Setareh Shahkarami, M. Gabriela Mángano, Luis A. Buatois
Published: 12 September 2017
Journal of Paleontology (2017) 91 (6): 1178–1198.
DOI: https://doi.org/10.1017/jpa.2017.72
..., 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...
View PDF for article title, Ichnostratigraphy of the Ediacaran-Cambrian boundary: new insights on lower Cambrian biozonations from the Soltanieh Formation of northern Iran
Purchase
Add to Citation Manager for Ichnostratigraphy of the Ediacaran-Cambrian boundary: new insights on lower Cambrian biozonations from the Soltanieh Formation of northern Iran
Journal Article

Burrowing below the basal Cambrian GSSP, Fortune Head, Newfoundland Available to Purchase

JAMES G. GEHLING, SÖREN JENSEN, MARY L. DROSER, PAUL M. MYROW, GUY M. NARBONNE
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...
FIGURES
View PDF for article title, Burrowing below the basal Cambrian GSSP, Fortune Head, Newfoundland
Purchase
Add to Citation Manager for Burrowing below the basal Cambrian GSSP, Fortune Head, Newfoundland
Journal Article

The Ediacaran–Cambrian Chapel Island Formation of Newfoundland, Canada: evaluating the impact of outcrop quality on trace-fossil data sets at the Cambrian GSSP and less-explored sections Available to Purchase

Romain Gougeon, M. Gabriela Mángano, Luis A. Buatois, Guy M. Narbonne, Brittany A. Laing, Maximiliano Paz
Published: 23 December 2022
Canadian Journal of Earth Sciences (2023) 60 (7): 897–911.
DOI: https://doi.org/10.1139/cjes-2022-0060
...Fig. 5. Variations in Treptichnus pedum preservation in relation to different types of outcrop exposure. Scale bars are 1 cm. ( a ) Bed base with segments extending laterally on a flat, well exposed surface. Positive hyporelief, Grand Bank Head, M2A. ( b ) Oblique weathering of a bed top...
FIGURES | View All (6)
View PDF for article title, The Ediacaran–Cambrian Chapel Island Formation of Newfoundland, Canada: evaluating the impact of outcrop quality on trace-fossil data sets at the Cambrian GSSP and less-explored sections
Purchase
Add to Citation Manager for The Ediacaran–Cambrian Chapel Island Formation of Newfoundland, Canada: evaluating the impact of outcrop quality on trace-fossil data sets at the Cambrian GSSP and less-explored sections
Journal Article

Tulaneia amabilia n. gen. n. sp.: a new erniettomorph from the Wood Canyon Formation, Nevada and the age of the Ediacaran–Cambrian transition in the Great Basin Open Access

Bruce Runnegar, Robert J. Horodyski, James G. Gehling, Sören Jensen, Stefan Bengtson, Kevin J. Peterson, Matthew R. Saltzman, Michael J. Vendrasco
Published: 01 November 2024
Journal of Paleontology (2024) 98 (6): 929–951.
DOI: https://doi.org/10.1017/jpa.2024.45
...) was confirmed by subsequent discoveries. Because the upper part of the LMWCF contains Treptichnus pedum (Seilacher), the Ediacaran–Cambrian boundary has long been drawn at its first appearance. However, in the Esmeralda Member of the Deep Spring Formation in the White-Inyo Mountains, California, and at Mount...
FIGURES | View All (12)
View PDF for article title, Tulaneia amabilia n. gen. n. sp.: a new erniettomorph from the Wood Canyon Formation, Nevada and the age of the Ediacaran–Cambrian transition in the Great Basin
Add to Citation Manager for Tulaneia amabilia n. gen. n. sp.: a new erniettomorph from the Wood Canyon Formation, Nevada and the age of the Ediacaran–Cambrian transition in the Great Basin
Journal Article

Distribution and correlation of Sabellidites cambriensis (Annelida?) in the basal Cambrian on Baltica Open Access

Jan Ove R. Ebbestad, Frida Hybertsen, Anette E. S. Högström, Sören Jensen, Teodoro Palacios, Wendy L. Taylor, Heda Agić, Magne Høyberget, Guido Meinhold
Published: 09 December 2021
Geological Magazine (2022) 159 (7): 1262–1283.
DOI: https://doi.org/10.1017/S0016756821001187
.... Here, the Ediacaran–Cambrian boundary is located in the lower part of the upper parasequence (third cycle) of the Manndrapselva Member. Specimens of Sabellidites are rare but consistently present close to the lowest level of Treptichnus pedum and upsection, whereas the taxon is common and abundant...
FIGURES | View All (10)
View PDF for article title, Distribution and correlation of Sabellidites cambriensis (Annelida?) in the basal Cambrian on Baltica
Add to Citation Manager for Distribution and correlation of Sabellidites cambriensis (Annelida?) in the basal Cambrian on Baltica