1-20 OF 1937 RESULTS FOR

Whittaker Formation

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

Silurian Brachiopoda, Upper Allen Bay Formation, Griffiths Island, Arctic Archipelago, and Uppermost Whittaker Formation, Mackenzie Mountains, Northwest Territories Free

Alfred C. Lenz
Published: 01 August 1974
Canadian Journal of Earth Sciences (1974) 11 (8): 1123–1135.
DOI: https://doi.org/10.1139/e74-107
...Alfred C. Lenz Abstract A low diversity fauna of brachiopods is described from the top beds of the Whittaker Formation of the central Mackenzies, and the upper part of the Allen Bay Formation, Griffiths Island. The fauna of the two formations together total 10 species, although only two species...
Add to Citation Manager for Silurian Brachiopoda, Upper Allen Bay <span class="search-highlight">Formation</span>, Griffiths Island, Arctic Archipelago, and Uppermost <span class="search-highlight">Whittaker</span> <span class="search-highlight">Formation</span>, Mackenzie Mountains, Northwest Territories
Journal Article

The peculiar Ordovician trilobite Hypodicranotus from the Whittaker Formation, District of Mackenzie Free

Rolf Ludvigsen, Brian D. E. Chatterton
Published: 01 April 1991
Canadian Journal of Earth Sciences (1991) 28 (4): 616–622.
DOI: https://doi.org/10.1139/e91-053
...Rolf Ludvigsen; Brian D. E. Chatterton Abstract The complete exoskeleton of the widely dispersed remopleuridid trilobite Hypodicranotus is reconstructed for the first time based on well-preserved silicified material of Hypodicranotus striatulus (Walcott 1875) from the lower Whittaker Formation...
Add to Citation Manager for The peculiar Ordovician trilobite Hypodicranotus from the <span class="search-highlight">Whittaker</span> <span class="search-highlight">Formation</span>, District of Mackenzie
Journal Article

Upper Ordovician conodonts, brachiopods, and chronostratigraphy of the Whittaker Formation, southwestern District of Mackenzie, N.W.T., Canada Free

Charles E. Mitchell, Walter C. Sweet
Published: 01 January 1989
Canadian Journal of Earth Sciences (1989) 26 (1): 74–87.
DOI: https://doi.org/10.1139/e89-007
...Charles E. Mitchell; Walter C. Sweet Abstract Ten samples from a 160 m section through the lower Whittaker Formation yielded Red River Province conodonts as well as a shelly macrofossil assemblage representing the "Arctic Ordovician fauna." Both the microfossils and macrofossils have strong...
Add to Citation Manager for Upper Ordovician conodonts, brachiopods, and chronostratigraphy of the <span class="search-highlight">Whittaker</span> <span class="search-highlight">Formation</span>, southwestern District of Mackenzie, N.W.T., Canada
Journal Article

New cheirurinid trilobites from the lower Whittaker Formation (Ordovician), southern Mackenzie Mountains Free

Rolf Ludvigsen
Published: 01 July 1976
Canadian Journal of Earth Sciences (1976) 13 (7): 947–959.
DOI: https://doi.org/10.1139/e76-097
...Rolf Ludvigsen Abstract Two new genera of cheirurinid trilobites are described from the lower Whittaker Formation (?Rocklandian to Edenian; late Middle and early Late Ordovician) of the southern Mackenzie Mountains. The monotypic genus, Whittakerites n. gen., is a probable descendant of Ceraurus...
Add to Citation Manager for New cheirurinid trilobites from the lower <span class="search-highlight">Whittaker</span> <span class="search-highlight">Formation</span> (Ordovician), southern Mackenzie Mountains
Image
Simplified stratigraphic column from Whittaker Formation (Fm.) to MOTH fish-bearing interval. Data from 1996 and 1998 measurements. Modified from Hanke (2001).

Simplified stratigraphic column from Whittaker Formation (Fm.) to MOTH fish... Available to Purchase

Published: 19 July 2005
Fig. 2. Simplified stratigraphic column from Whittaker Formation (Fm.) to MOTH fish-bearing interval. Data from 1996 and 1998 measurements. Modified from Hanke ( 2001 ).
Journal Article

Ordovician Formations and Faunas, Southern Mackenzie Mountains Free

Rolf Ludvigsen
Published: 01 April 1975
Canadian Journal of Earth Sciences (1975) 12 (4): 663–697.
DOI: https://doi.org/10.1139/e75-059
...Rolf Ludvigsen Abstract Ordovician strata of the South Nahanni River area occur as a western fine clastic facies with graptolitic faunas (Road River Formation) and an eastern carbonate facies with shelly faunas (Broken Skull, Sunblood, Esbataottine, and Whittaker Formations). The lithofacies...
Add to Citation Manager for Ordovician <span class="search-highlight">Formations</span> and Faunas, Southern Mackenzie Mountains
Journal Article

An Edgewood-type Hirnantian fauna from the Mackenzie Mountains, northwestern margin of Laurentia Open Access

Jisuo Jin, David A.T. Harper
Published: 01 January 2024
Journal of Paleontology (2024) 98 (1): 13–39.
DOI: https://doi.org/10.1017/jpa.2023.87
...Jisuo Jin; David A.T. Harper Abstract Silicified brachiopods from Hirnantian strata in three sections of the lower Whittaker Formation, Mackenzie Mountains, northwestern Canada, yielded a moderately diverse, Edgewood-type Hirnantian fauna, consisting of 13 species: Biparetis paucirugosus...
FIGURES | View All (12)
View PDF for article title, An Edgewood-type Hirnantian fauna from the Mackenzie Mountains, northwestern margin of Laurentia
Add to Citation Manager for An Edgewood-type Hirnantian fauna from the Mackenzie Mountains, northwestern margin of Laurentia
Journal Article

Systematics of Encrinuroides and Curriella (Trilobita), with a new Early Silurian encrinurine from the Mackenzie Mountains Free

Gregory D. Edgecombe, Brian D. E. Chatterton
Published: 01 June 1990
Canadian Journal of Earth Sciences (1990) 27 (6): 820–833.
DOI: https://doi.org/10.1139/e90-085
... cladograms (consistency index = 0.68) based on 28 exoskeletal characters. Curriella Lamont, 1978 is revised to include Curriella clancyi n.sp., based on silicified material from earliest Llandovery strata of the Whittaker Formation in the Mackenzie Mountains, Northwest Territories. The new species is most...
Add to Citation Manager for Systematics of Encrinuroides and Curriella (Trilobita), with a new Early Silurian encrinurine from the Mackenzie Mountains
Journal Article

Silurian (Wenlock) brachiopods from the southern Mackenzie Mountains, Northwest Territories Free

Alfred C. Lenz
Published: 01 June 1989
Canadian Journal of Earth Sciences (1989) 26 (6): 1220–1233.
DOI: https://doi.org/10.1139/e89-103
...Alfred C. Lenz Abstract Twelve species of brachiopods of probable Wenlock age are described from a fauna of approximately 39 species from the upper part of the Whittaker Formation of the southern Mackenzie Mountains. The fauna is probably from the near-platform-edge benthic setting...
Add to Citation Manager for Silurian (Wenlock) brachiopods from the southern Mackenzie Mountains, Northwest Territories
Image
Fig. 16.

Plaesiomys lenzi (new species). Holotype (A–E): dorsal, ventral, anterior,... Available to Purchase

Published: 04 July 2013
Fig. 16. Plaesiomys lenzi (new species). Holotype (A–E): dorsal, ventral, anterior, posterior, and lateral views showing fine ribbing pattern of the species, respectively; GSC 131790, locality M1730–1735 ft (527–529 m) ( Wigington 1977 ), Whittaker Formation, Mackenzie Mountains, Northwest
Image
(1–3) Parastrophina cf. P. minor (Roy, 1941), GSC 131876, incomplete dorsal valve from locality S-2, Hirnantian strata of the lower Whittaker Formation, central Mackenzie Mountains; exterior, interior, and tilted anterior view showing alate plates (arrows in 3) and long cruralium raised anteriorly above valve floor by median septum. (4–14) Brevilamnulella laevis (Sapelnikov and Rukavishnikova, 1975); (4–7) UA 107307, ventral valve from section AV4B, 111.3–111.4 m above base of section, lower Whittaker Formation, Hirnantian, Avalanche Lake, southern Mackenzie Mountains; exterior, interior, tilted anterior, and tilted lateral views, showing high median septum supporting broad V-shaped spondylium; (8–11) UA10736, dorsal valve from section AV1, 77.5 m above base of section, lower Whittaker Formation, Hirnantian, Avalanche Lake, southern Mackenzie Mountains; exterior, interior, tilted anterior, tilted lateral views showing short and low inner hinge plates (arrows in 10, 11); (12–14) GSC 131877, exterior, interior, and tilted apical views of dorsal valve with minor damage, also from section AV1, 77.5 m (arrows indicate inner hinge plates).

( 1 – 3 ) Parastrophina cf. P . minor (Roy, 1941 ), GSC 131876, incom... Open Access

Published: 01 January 2024
Figure 11. ( 1 – 3 ) Parastrophina cf. P . minor (Roy, 1941 ), GSC 131876, incomplete dorsal valve from locality S-2, Hirnantian strata of the lower Whittaker Formation, central Mackenzie Mountains; exterior, interior, and tilted anterior view showing alate plates (arrows in 3 ) and long
Image
Figure3—Interior views of dorsal valves of various taxa showing well-developed interarea. 1–3,Pentamerus oblongusJ. de C. Sowerby, 1839, Fossil Hill Formation, lower-middle Telychian, Manitoulin Island, Ontario; 1, 2, W2820; 3, W2821. 4,Conchidium sp., W2822, Cape Phillips Formation, lower Ludlow, Baillie Hamilton Island, Arctic Canada. 5,Cymbidium kirkiJin and Chatterton, 1997, UA10690, upper Whittaker Formation, lower Wenlock, Avalanche Lake area, Mackenzie Mountains. 6,Vosmiverstum breiveliZhang, 1989, UA10696, upper Whittaker Formation, lower Wenlock, Avalanche Lake area. Scale bars = 5 mm

Figure 3 —Interior views of dorsal valves of various taxa showing well-dev... Available to Purchase

Published: 01 January 2006
Formation, lower Ludlow, Baillie Hamilton Island, Arctic Canada. 5, Cymbidium kirki Jin and Chatterton, 1997 , UA10690, upper Whittaker Formation, lower Wenlock, Avalanche Lake area, Mackenzie Mountains. 6, Vosmiverstum breiveli Zhang, 1989 , UA10696, upper Whittaker Formation, lower Wenlock
Image
Fig. 15.

Plaesiomys periosa (new species). (A–E) Holotype: dorsal, ventral, lateral... Available to Purchase

Published: 04 July 2013
Fig. 15. Plaesiomys periosa (new species). (A–E) Holotype: dorsal, ventral, lateral, anterior, and posterior views, respectively; note its much larger size than other species of the genus; GSC 131793, locality LZ-26, 245 ft (75 m) ( Wigington 1977 ), Whittaker Formation, Mackenzie Mountains
Image
(1–11) Biparetis paucirugosus Amsden, 1974, two specimens from locality S-2, Hirnantian strata of the lower Whittaker Formation, central Mackenzie Mountains. (1–4) GSC 131874, dorsal, ventral, lateral, and posterior apical views of immature, concavo-convex shell, showing presence of concentric rugae; (5–11) GSC 131875, dorsal, ventral (slightly tilted to show trail), ventral (low-angle lighting to show weak concentric rugae), lateral, and anterior views of concavo-convex shell with sharp geniculation and prominent trail (8), and details of epibionts on dorsal valve (10, 11). (12–15) Katastrophomena mackenzii new species, GSC 131873, paratype, dorsal, lateral, ventral, and apical views of incomplete shell showing biconvexity, locality S-2, Hirnantian strata of the lower Whittaker Formation, central Mackenzie Mountains.

( 1 – 11 ) Biparetis paucirugosus Amsden, 1974 , two specimens from loca... Open Access

Published: 01 January 2024
Figure 10. ( 1 – 11 ) Biparetis paucirugosus Amsden, 1974 , two specimens from locality S-2, Hirnantian strata of the lower Whittaker Formation, central Mackenzie Mountains. ( 1 – 4 ) GSC 131874, dorsal, ventral, lateral, and posterior apical views of immature, concavo-convex shell, showing
Image
Stratigraphy of the Ordovician–Silurian boundary interval of the lower Whittaker Formation. AV, Avalanche Lake sections, southern Mackenzie Mountains (see Jin and Chatterton, 1997).

Stratigraphy of the Ordovician–Silurian boundary interval of the lower Whit... Open Access

Published: 01 January 2024
Figure 2. Stratigraphy of the Ordovician–Silurian boundary interval of the lower Whittaker Formation. AV, Avalanche Lake sections, southern Mackenzie Mountains (see Jin and Chatterton, 1997 ).
Image
Gnamptorhynchos orbiculoidea (Jin and Chatterton, 1997). (1–4) UA 10499, holotype, dorsal, ventral, posterior views, and enlarged view of tubercular shell surface (4) of incomplete, conjoined shell, section AV4B, 111.3–111.6 m above base of section, lower Whittaker Formation, Hirnantian, Avalanche Lake, southern Mackenzie Mountains. (5–18) Four specimens from locality S-2, Hirnantian strata of the lower Whittaker Formation, central Mackenzie Mountains; (5–7) GSC 131858, dorsal, ventral, and lateral views of conjoined shell (slightly offset between two valves posteriorly); (8–11) dorsal, GSC 131859, dorsal, ventral, posterior, and anterior views of small shell; (12–14) GSC 131860, exterior, posterior interior showing anteriorly raised notothyrium and ridge-like cardinal process, and shell surface tubercles (some preserved as long filaments) of dorsal valve; (15, 16) GSC 131861, exterior and interior of ventral valve, showing typical platystrophiid muscle field; (17, 18) GSC 131862, exterior and interior of dorsal valve.

Gnamptorhynchos orbiculoidea (Jin and Chatterton, 1997 ). ( 1 – 4 ) UA 10... Open Access

Published: 01 January 2024
Figure 6. Gnamptorhynchos orbiculoidea (Jin and Chatterton, 1997 ). ( 1 – 4 ) UA 10499, holotype, dorsal, ventral, posterior views, and enlarged view of tubercular shell surface ( 4 ) of incomplete, conjoined shell, section AV4B, 111.3–111.6 m above base of section, lower Whittaker Formation
Image
(1–11) Glyptorthis papillosa new species, locality S-2, Hirnantian strata of the lower Whittaker Formation, central Mackenzie Mountains. (1–3) GSC 131852, holotype, exterior, interior, and details of papillae-bearing growth lamellae of anteriorly damaged ventral valve (largest specimen available for the new species). (4–7) GSC 131853, paratype, exterior, interior, enlarged image of dental plates, and papillae-bearing growth lamellae of small, incomplete ventral valve. (8, 9) GSC 131854, paratype, interior and detailed view of delthyrium and teeth of small, laterally damaged ventral valve. (10, 11) GSC 131855, paratype, exterior and interior of dorsal valve, showing weak, blade-like cardinal process. (12–15) Skenidioides sp. from Hirnantian strata of Whittaker Formation, Avalanche Lake area, southern Mackenzie Mountains; (12, 13) GSC 131856, exterior and interior view of ventral valve, section AV1, 77.5 m above base of section; (14, 15) GSC 131857, interior and tilted apical views of incomplete ventral valve, showing spondylium supported by short median septum (15).

( 1–11 ) Glyptorthis papillosa new species, locality S-2, Hirnantian stra... Open Access

Published: 01 January 2024
Figure 5. ( 1–11 ) Glyptorthis papillosa new species, locality S-2, Hirnantian strata of the lower Whittaker Formation, central Mackenzie Mountains. (1–3 ) GSC 131852, holotype, exterior, interior, and details of papillae-bearing growth lamellae of anteriorly damaged ventral valve (largest
Image
The MOTH locality section, including the relative position of the Silurian B-MOTH and Devonian MOTH fish layers, based on the 1996 section measurement. The transition from the Whittaker Formation (Fm.) to the Delorme Formation, and the Silurian– Devonian boundary have not been identified in the section.

The MOTH locality section, including the relative position of the Silurian ... Available to Purchase

Published: 24 October 2000
Fig. 2. The MOTH locality section, including the relative position of the Silurian B-MOTH and Devonian MOTH fish layers, based on the 1996 section measurement. The transition from the Whittaker Formation (Fm.) to the Delorme Formation, and the Silurian– Devonian boundary have not been identified
Image
Katastrophomena mackenzii new species. (1–13) Five specimens from locality S-2, Hirnantian strata of the lower Whittaker Formation, central Mackenzie Mountains; (1–3) GSC 131870, paratype, exterior, interior, and posterior views of incomplete ventral valve; note fascicostellae and semi-tubular pseudodeltidium (3); (4–6) GSC 131869, paratype, dorsal, ventral, and posterior views of incomplete, conjoined shell; note strongly developed fascicostellae; (7, 8) GSC 131868, holotype, exterior and interior views of dorsal valve; note short central pair of trans-muscle septa, and knobby lateral septa (8); (9, 10) GSC 131871, paratype, exterior and interior of relatively small dorsal valve; (11–13) GSC 131872, paratype, interior and exterior views of posterior fragment of relatively large dorsal valve, and detailed view of cardinalia (13), note well-developed fascicostellae and oval-shaped adductor scars; (14–18) two specimens from section AV4B, 111.3–111.6 m above base of section, lower Whittaker Formation, Hirnantian, Avalanche Lake, southern Mackenzie Mountains; (14–16) UA 10636, paratype, exterior, interior of dorsal valve, and detailed view of cardinalia (16); (17, 18) UA 10635, paratype, exterior and detailed view of ventral muscle field.

Katastrophomena mackenzii new species. ( 1 – 13 ) Five specimens from loca... Open Access

Published: 01 January 2024
Figure 9. Katastrophomena mackenzii new species. ( 1 – 13 ) Five specimens from locality S-2, Hirnantian strata of the lower Whittaker Formation, central Mackenzie Mountains; ( 1 – 3 ) GSC 131870, paratype, exterior, interior, and posterior views of incomplete ventral valve; note fascicostellae
Image
Epitomyonia paucitropida Chen, Jin, and Lenz, 2008, locality S-2, Hirnantian strata of the lower Whittaker Formation, central Mackenzie Mountains. (1–5) GSC 131796, paratype, dorsal, ventral, lateral, posterior, and anterior views. (6, 7) GSC 131794, holotype, exterior and interior; note transverse ridges located close to mid-length of valve. (8–12) GSC 131798, dorsal, ventral, lateral, posterior, and anterior views.

Epitomyonia paucitropida Chen, Jin, and Lenz, 2008 , locality S-2, Hirnan... Open Access

Published: 01 January 2024
Figure 7. Epitomyonia paucitropida Chen, Jin, and Lenz, 2008 , locality S-2, Hirnantian strata of the lower Whittaker Formation, central Mackenzie Mountains. ( 1 – 5 ) GSC 131796, paratype, dorsal, ventral, lateral, posterior, and anterior views. ( 6 , 7 ) GSC 131794, holotype, exterior