2002RB32: Ludlow, Alaska
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Scaphopoda
- Dentaliida
- Dentaliidae
|
|||||||
Dentalium hecetaensis
Rohr et al. 2006
|
Rohr et al. 2006 | ||||||
= "Dentalium" hecetaensis
Rohr et al. 2006
|
Wagner 2023 | ||||||
Rostroconchia
- Ribeirioida
|
|||||||
Rhytiodentalium cf. kentuckyensis
|
Rohr et al. 2006 | ||||||
Gastropoda
- Euomphalina
- Oriostomatidae
|
|||||||
Beraunia bifrons
(Perner 1903)
|
|||||||
Beraunia bohemica
(Perner 1903)
|
|||||||
Hecetastoma gehrelsi n. gen., n. sp.
Rohr and Blodgett 2008
|
|||||||
Gastropoda
- Euomphalina
- Euomphalidae
|
|||||||
Bathmopterus liratus
Kirk 1928
|
|||||||
recombined as Euomphalopterus liratus | |||||||
Gastropoda
- Euomphalina
- Holopeidae
|
|||||||
Pachystrophia gotlandica
(Lindström 1884)
|
|||||||
recombined as Pachystrophia gotlandicus | |||||||
Gastropoda
- Bellerophontida
- Bellerophontidae
|
|||||||
Retispira aff. volgulica
(Chernyshev 1893)
|
|||||||
recombined as Bucanopsis volgulica | |||||||
Gastropoda
- Murchisoniina
- Plethospiridae
|
|||||||
Baichtalia tongassensis n. gen., n. sp.
Rohr and Blodgett 2008
|
|||||||
recombined as Kirkospira tongassensis | |||||||
Kirkospira glacialis
Rohr and Blodgett 2001
|
|||||||
Gastropoda
- Murchisoniina
- Hormotomidae
|
|||||||
Coelocaulus karlae
Rohr et al. 2003
|
|||||||
Medfracaulus turriformis
(Chernyshev 1893)
|
|||||||
see common names |
Geography
Country: | United States | State/province: | Alaska |
Coordinates: | 55.8° North, 133.0° West (view map) | ||
Paleocoordinates: | 6.5° South, 90.3° West | ||
Basis of coordinate: | stated in text | ||
Geographic resolution: | outcrop |
Time
Period: | Silurian | Epoch: | Ludlow |
10 m.y. bin: | Silurian 2 | ||
Key time interval: | Ludlow | ||
Age range of interval: | 427.40000 - 423.00000 m.y. ago |
Stratigraphy
Formation: | Heceta Limestone |
Stratigraphic resolution: | formation |
Lithology and environment
Primary lithology: | lithified silty wackestone |
Secondary lithology: | packstone |
Includes fossils? | Y |
Includes fossils? | Y |
Lithology description: a silty wackestone to packstone | |
Environment: | carbonate indet. |
Taphonomy
Modes of preservation: | original silica,replaced with silica |
Size of fossils: | macrofossils |
Collection methods and comments
Collection excludes: | some genera |
Collection methods: | bulk,chemical,acetic,field collection |
Reason for describing collection: | taxonomic analysis |
Museum repositories: | USNM |
Taxonomic list comments:The Heceta Limestone contains a rich megafauna, some elements of which have previously been described and/or illustrated elsewhere: brachiopods (Kirk, 1922, 1925, 1926; Kirk and Amsden, 1952; Savage, 1989); sphinctozoan sponges (Rigby et al., 1994); and corals (Oliver, 1964; Oliver et al., 1975). However, the greater part of the megafauna remains undescribed to date. Elements currently undergoing further study include brachiopods (Boucot and Blodgett), scaphopods (Rohr and Blodgett), and corals (A.E.H. Pedder). Calcareous algae are extremely common in the algal (microbial) reef complexes of the Heceta Limestone (Riding and Soja, 1993; Soja and Riding, 1993). |
Metadata
Also known as: | talus blocks derived from a horizon near the top of the wall face at the northwest corner of a large quarry, | ||
Database number: | 85025 | ||
Authorizer: | P. Wagner, A. Miller | Enterer: | P. Wagner, S. Kolbe |
Modifier: | S. Kolbe | Research group: | marine invertebrate |
Created: | 2008-11-21 22:32:26 | Last modified: | 2010-12-01 10:56:28 |
Access level: | the public | Released: | 2008-11-21 22:32:26 |
Creative Commons license: | CC BY |
Reference information
Primary reference:
27095. | D. M. Rohr and R. B. Blodgett. 2008. Silurian Gastropoda from the Alexander terrane, southeast Alaska. Geological Society of America Special Paper 442:51-61 [P. Wagner/P. Wagner/P. Wagner] |
Secondary references:
28551 | O. K. Bogolepova, A. P. Gubanov, and V. I. Pease. 2005. Bohemian-type Silurian (Telychian) bivalves from Arctic Russia. Geologiska Föreningen 127(4):247-252 [P. Wagner/P. Wagner] | |
34392 | D. M. Rohr, R. B. Blodgett, and J. Baichtal. 2006. Scaphopoda from the Alexander Terrane, Southeast Alaska: The first occurrence of Scaphopoda in the Silurian. Palaeoworld 15:211-215 [A. Miller/S. Kolbe/S. Kolbe] | |
9042 | P. J. Wagner. 2023. Paleozoic Gastropod, Rostroconch, Helcionelloid and Tergomyan Database (2006 - 2023). [P. Wagner/P. Wagner/P. Wagner] |