NH-24.5 - Nahant (Cambrian of the United States)

Where: Massachusetts (42.4° N, 70.9° W: paleocoordinates 72.5° S, 62.4° W)

• coordinate based on political unit

• outcrop-level geographic resolution

When: Aldanella attleborensis trilobite zone, Lower Member (Weymouth Formation), Placentian (538.8 - 517.1 Ma)

• Camenella baltica zone

• bed-level stratigraphic resolution

Environment/lithology: lithified wackestone

• lime mudstone to fossil wackestone, thin (102cm) bedded, weathiering into 10 cm beds, light greenish to light green (epidotized); weather white, locally a cryptalgalaminate

Size class: macrofossils

Primary reference: E. Landing. 1988. Lower Cambrian of eastern Massachusetts: stratigraphy and small shelly fossils. Journal of Paleontology 62(5):661-695 [P. Wagner/P. Wagner]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 56833: authorized by Pete Wagner, entered by Pete Wagner on 26.11.2005

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names
Helcionelloida
  - Stenothecidae
? Mellopegma sp.
? Mellopegma sp. Runnegar and Jell 1976
 Helcionellida - Pelagiellidae
Pelagiella sp.
Pelagiella sp. Matthew 1895
 Pelagiellida - Aldanellidae
Aldanella attleborensis
Aldanella attleborensis Shaler and Foerste 1888
Orthothecimorpha
 Circothecida -
"Ladatheca" cylindrica
Hyolitha
 Orthothecida - Allathecidae
"Allatheca" sensu lato degeeri
Brachiopoda
 Tommotiida -
Eccentrotheca kanesia
Eccentrotheca kanesia Landing et al. 1980