Turlock Lake Formation

Turlock Lake Formation Stratigraphic range: Early Pleistocene
Type	Geologic formation
Underlies	Riverbank Formation
Overlies	Mehrten Formation, North Merced Pediment and Gravels
Lithology
Primary	Granitic sand over stratified silt
Location
Region	Sacramento County, California
Country	United States

The Turlock Lake Formation is an Early Pleistocene geologic formation in the Sierra Nevada foothills in Sacramento County, California. Cities in/over the formation's area include Citrus Heights, Carmichael, and Roseville.^[1]

The Turlock Lake Formation is a fan deposit of dominantly granitic alluvium covering the westward extension of the North Merced Pediment and Gravels formation, and directly overlying the Mehrten Formation.^[2]

It preserves Early Pleistocene Quaternary period fossils.

References

↑ California Geological Survey: Geologic Map of the Sacramento Quadrangle
↑ California Division of Mines and Geology.ca..gov: "The GEOLOGY, GEOMORPHOLOGY, and SOILS of the SAN JOAQUIN VALLEY in the VICINITY of the MERCED RIVER, CALIFORNIA.", by RODNEY J. ARKLEY Lecturer and Specialist in the Agricultural Experiment Station, Department of Soils and Plant Nutrition, University of California, Berkeley, California.

Various Contributors to the Paleobiology Database. "Fossilworks: Gateway to the Paleobiology Database". Retrieved 8 July 2014.

Quaternary
Pleistocene	Holocene
Early \| Middle \| Late	Preboreal \| Boreal \| Atlantic \| Subboreal \| Subatlantic

Geologic history of Earth

Cenozoic era
(present–66.0 Mya)

Quaternary (present–2.58 Mya)	Holocene (present–11.7 kya) Pleistocene (11.7 kya–2.58 Mya)

Neogene (2.58–23.03 Mya)	Pliocene (2.58–5.333 Mya) Miocene (5.333–23.03 Mya)

Paleogene (23.03–66.0 Mya)	Oligocene (23.03–33.9 Mya) Eocene (33.9–56.0 Mya) Paleocene (56.0–66.0 Mya)

Mesozoic era
(66.0–252.17 Mya)

Cretaceous (66.0–145.0 Mya)	Late (66.0–100.5 Mya) Early (100.5–145.0 Mya)

Jurassic (145.0–201.3 Mya)	Late (145.0–163.5 Mya) Middle (163.5–174.1 Mya) Early (174.1–201.3 Mya)

Triassic (201.3–252.17 Mya)	Late (201.3–237 Mya) Middle (237–247.2 Mya) Early (247.2–252.17 Mya)

Paleozoic era
(252.17–541.0 Mya)

Permian (252.17–298.9 Mya)	Lopingian (252.17–259.8 Mya) Guadalupian (259.8–272.3 Mya) Cisuralian (272.3–298.9 Mya)

Carboniferous (298.9–358.9 Mya)	Pennsylvanian (298.9–323.2 Mya) Mississippian (323.2–358.9 Mya)

Devonian (358.9–419.2 Mya)	Late (358.9–382.7 Mya) Middle (382.7–393.3 Mya) Early (393.3–419.2 Mya)

Silurian (419.2–443.8 Mya)	Pridoli (419.2–423.0 Mya) Ludlow (423.0–427.4 Mya) Wenlock (427.4–433.4 Mya) Llandovery (433.4–443.8 Mya)

Ordovician (443.8–485.4 Mya)	Late (443.8–458.4 Mya) Middle (458.4–470.0 Mya) Early (470.0–485.4 Mya)

Cambrian (485.4–541.0 Mya)	Furongian (485.4–497 Mya) Series 3 (497–509 Mya) Series 2 (509–521 Mya) Terreneuvian (521–541.0 Mya)

Precambrian supereon
(541.0 Mya–4.567 Gya)

Proterozoic (541.0 Mya–2.5 Gya)	Neoproterozoic (541.0 Mya–1 Gya) Mesoproterozoic (1–1.6 Gya) Paleoproterozoic (1.6–2.5 Gya)

Archean (2.5–4 Gya)	Neoarchean (2.5–2.8 Gya) Mesoarchean (2.8–3.2 Gya) Paleoarchean (3.2–3.6 Gya) Eoarchean (3.6–4 Gya)

Hadean (4–4.567 Gya)	Neohadean (4–4.1 Gya) Mesohadean (4.1–4.3 Gya) Paleohadean (4.3–4.567 Gya)

kya = thousands years ago. Mya = millions years ago. Gya = billions years ago.
Source: (2015/01). International Commission on Stratigraphy. Retrieved 13 July 2015. Divisions of Geologic Time—Major Chronostratigraphic and Geochronologic Units USGS Retrieved 10 March 2013.

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Turlock Lake Formation

See also

References