Vicinity of Notch Peak, North Canyon [Weeks Fm] (Cambrian of the United States)

Where: Millard County, Utah (39.2° N, 113.3° W: paleocoordinates 4.1° S, 89.9° W)

• coordinate stated in text

• small collection-level geographic resolution

When: Weeks Formation, Guzhangian (500.5 - 497.0 Ma)

• LITHOSTRATIGRAPHY: From the Weeks Fm, which conformably overlies the Marjum Fm, and is conformably overlain by the Orr Fm. AGE: late Guzhangian (i.e. late Cambrian Epoch 3, formerly early late Cambrian on the basis of trilobite biostratigraphy.

• group of beds-level stratigraphic resolution

Environment/lithology: deep subtidal shelf; lithified, peloidal, gray lime mudstone

• ENVIRONMENT: "open-shelf marine environment"; transgressive
• GENERAL LITHOLOGY: The unit consists of approximately 300 m of shallowing-upward, mostly thin-bedded lime mudstones with variable but limited amounts of sand-sized and finer siliciclastic sediments. upper Weeks Formation, which consists primarily of thinly bedded (0.5-4.0 cm) silty lime-mudstone. The silt to fine quartz sand portion of this facies typically forms thin, reddish-orange, irregular laminae and parting surfaces between grey lime-mudstone with common peloids

Size class: macrofossils

Preservation: mold/impression, soft parts, replaced with phosphate

Collected by Bonino

Collection methods: surface (in situ),

• COLLECTOR: Not stated in text, but presumably E. Bonino. REPOSITORY: Back to the Past Museum (Cancun, Mexico; BPM).

Primary reference: J. Ortega-Hernandez, R. Lerosey-Aubril, C. Kier and E. Bonino. 2014. A rare non-trilobite artiopodan from the Guzhangian (Cambrian Series 3) Weeks Formation konservat-lagerstatte in Utah, USA. Palaeontology [A. Hendy/A. Hendy]more details

Purpose of describing collection: paleoecologic analysis

PaleoDB collection 163390: authorized by Austin Hendy, entered by Austin Hendy on 25.10.2014, edited by Phil Novack-Gottshall

Creative Commons license: CC BY (attribution)

Taxonomic list

• COVERAGE: Limited to artiopod described in text. NOMENCLATURE: Authoritative publication, with species-resolution identifications, and modern nomenclature.
Show authors, comments, and common names
 Bilateria - Dakorhachiidae
Dakorhachis thambus n. gen. n. sp.
Dakorhachis thambus n. gen. n. sp. Conway Morris et al. 2020
Artiopoda
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Falcatamacaris bellua n. gen. n. sp.
Falcatamacaris bellua n. gen. n. sp. Ortega-Hernandez et al. 2014