Nestucca Formation
Stratigraphic range: Bartonian- Priabonian ~40–34  Ma PreꞒ Ꞓ O S D C P T J K Pg N
Type	Formation
Lithology
Primary	Siltstone
Other	Sandstone, shale
Location
Coordinates	45°12′N 124°00′W / 45.2°N 124.0°W / 45.2; -124.0
Approximate paleocoordinates	45°30′N 111°42′W / 45.5°N 111.7°W / 45.5; -111.7
Region	Tillamook County, Oregon
Country	United States
Type section
Named for	Nestucca River
Nestucca Formation (the United States) Show map of the United States Nestucca Formation (Oregon) Show map of Oregon

The Nestucca Formation is a geologic formation in Oregon. It preserves fossils dating back to the Bartonian to Priabonian stages of the Eocene period. ^[1]

The formation has provided fossils of: ^[1]

Mammals

• Mammalia indet. ^[2]

Fish

• Heptranchias howelli ^[3]
• Galeocerdo sp. ^[2]
• Raja sp. ^[2]
• Isurus sp. ^[2]

Gastropods

• Calliovarica oregonensis ^[4]

Bivalves

• Nucinella oregona ^[5]

Decapods

• Macroacaena alseanus ^{[3] [6]}

• List of fossiliferous stratigraphic units in Oregon
• Paleontology in Oregon
• Alsea Formation

• Hickman, C. S (2018), "A new Calliovarica species (Seguenzioidea: Chilodontidae) from the Eocene of Oregon, USA: Persistence of a relict Mesozoic gastropod group in a unique forearc tectonic setting", PaleoBios, 35: 1–10, doi: 10.5070/P9351038726
• Feldmann, R. M (1989), "Lyreidus alseanus Rathbun from the Paleogene of Washington and Oregon, U.S.A.", Annals of Carnegie Museum, 58: 61–70, doi: 10.5962/p.330566
• Welton, B. J (1974), "Heptranchias howellii (Reed, 1946) (Selachii: Hexanchidae) in the Eocene of the United States and British Columbia", PaleoBios, 17: 1–15
• Welton, B. J (1972), "Fossil sharks in Oregon", The Ore Bin, 34: 161–170
• Vokes, H. E (1956), "Notes on the Nucinellidae (Pelecypoda) with description of a new species from the Eocene of Oregon", Journal of Paleontology, 30: 652–671