[2] The Prince Creek Formation aged from 80 to 61.7 million years ago.

The Kikak-Tegoseak Quarry, where almost all of the dinosaur fossil are from, is located near the middle of the formation, and is about 70.6 to 69.1 million years ago.

[3][4] A lower section, the Kogosukruk Tongue, ages from 72 to 71 million years ago, in the latest Campanian.

[5] The youngest part of the formation is Ocean Point, which extends into the Paleogene, at the end of the Danian, based on the age of ostracods and mollusks.

[6] In the middle of the formation is the Coleville River Bluff, which extends from the Late Campanian to the Middle/Late Maastrichtian, in which pollen spores are common.

[7] During the time when the Prince Creek Formation was deposited, Earth was going through a greenhouse phase.

The rocks in it are alluvial, and were, at the time of burial, on a muddy coastal plain.

Leafy plants, roots and pollen are known from the formation, and they show that trampling by dinosaurs was common.

It can be proven that during the Maastrichtian the Prince Creek Formation bordered a large body of water by the presence of gypsum and pyrite in nearby rock.

Large amounts of plants material are represented by peridonoid dinocysts, algae, fungal hyphae, fern and moss spores, projectates, Wodehouseia edmontonicola, hinterland bisaccate pollen, and pollen from trees, shrubs, and herbs.

Based on the large amounts of dinosaur and plant remains, the Prince Creek Formation was deduced to be largely an ice-free woodland with an understory of angiosperm dominated by dinosaurs.

[1] The paleolatitude of the formation at the time of deposition was around 80°–85°N, high in the Arctic Circle, and would have likely experienced 120 days of winter darkness.

[8] Indeterminate tyrannosaurid remains are present, mostly in the form of teeth.

Gruipeda[11] G. vegrandiunis[11] Denali Park[11] Footprints from a small bird.

[13] Indeterminate Pediomys Point - Liscomb Quarry[13] Small dentary tip from a juvenile.

[3] Nanuqsaurus is a tyrannosaurid closely related to Lythronax, Tyrannosaurus, and Tarbosaurus.

Troodon[3] T. sp[3] Kikak-Tegoseak Quarry[3] Liscomb Quarry[9] Byers Bed[9] Magical Mystery Bar[14] Dental remains,[3] including teeth.

Alaskacephale[16] A. gangloffi[16] Kogosukruk Tongue[17] A squamosal, and the back of the dome.

Pachyrhinosaurus[4][18] P. perotorum[4][18] Kikak-Tegoseak Quarry[4] An abundance of skeletal remains,[4] including an immature juvenile.

[18] The youngest of the Pachyrhinosaurus species, found in one of the highest latitudes of centrosaurine discoveries.

[4] A discovery in the Kikak-Tegoseak Quarry was identified in 2013 as a juvenile of Pachyrhinosaurus perotorum.

This discovery shows that the crest started to develop in the front of the snout, then extending farther back until it reaches the eye.

[19] Indeterminate Teeth[19] Remains previously attributed to Thescelosaurus.

regalis[21] Liscomb Bonebed[20]Kikak-Tegoseak Quarry[4] Disassociated parts from multiple juveniles Originally identified as a distinct genus (Ugrunaaluk), recent studies have found it ontogenetically indistinguishable from Edmontosaurus.

[19] Parataxodium[17] P. wigginsii[17] Kogosukruk Tongue[17] A conifer, one of two from the region.

[17] Quereuxia[17] Q. angulata[17] Kogosukruk Tongue[17] An aquatic angiosperm.

Osmundacidites O. wellmanii Coleville River Bluff Pollen remains Common in the Early Maastrichtian.

Leosphaeridia L. "stellata" Coleville River Bluff Pollen remains Common in the Early Maastrichtian.

Indeterminate Indeterminate Coleville River Bluff Bissacate gymnosperm pollen Common and abundant in the Early Maastrichtian, becoming rarer towards the Late Maastrichtian.

A. amygdaloides Coleville River Bluff Pollen Numerous in the Late Campanian, becoming abundant in the Maastrichtian.