Lave Dam Five (LD5) 16.8T (Cambrian of the United States)

Where: Utah (38.8° N, 113.4° W: paleocoordinates 5.7° S, 87.6° W)

• coordinate estimated from map

• outcrop-level geographic resolution

When: Lava Dam Member (Notch Peak Formation), Sunwaptan (493.5 - 487.5 Ma)

• talus

• bed-level stratigraphic resolution

Environment/lithology: shallow subtidal; lithified lime mudstone and lithified, shelly/skeletal grainstone

• lime mudstones, bioclastic, intraclastic oolitic grainstones, intrarudites and microbial boundstones

Size classes: macrofossils, mesofossils

Preservation: cast, replaced with silica

Reposited in the SUI

Collection methods: chemical,

Primary reference: J. M. Adrain and S. R. Westrop. 2005. Late Cambrian ptychaspidid trilobites from western Utah: implications for trilobite systematics and biostratigraphy. Geological Magazine 142(4):377-398more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 235999: authorized by Melanie Hopkins, entered by Melanie Hopkins on 05.09.2024

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names
Trilobita
 Asaphida - Ptychaspididae
Idiomesus cf. intermedius, Macronoda notchpeakensis, Euptychaspis lawsonensis, Keithiella sp.
Macronoda notchpeakensis Adrain and Westrop 2005 trilobite
Euptychaspis lawsonensis Adrain and Westrop 2005 trilobite
Keithiella sp. Rasetti 1944 trilobite
 Harpetida - Entomaspididae
Notchpeakia taylori n. sp., Notchpeakia milleri n. sp.
Notchpeakia taylori n. sp. Adrain and Westrop 2006 trilobite
Notchpeakia milleri n. sp. Adrain and Westrop 2006 trilobite