Solvik Formation Explained

Solvik Formation
Type:	Geological formation
Age:	Early Llandovery (Silurian)
Period:	Silurian
Subunits:	Myren Member Spirodden Member Leangen Member Padda Member

The Solvik Formation is a geologic formation in the central Oslo Region of Norway.^[1] It preserves fossils dating back to the early Silurian period.

Fossil content

Brachiopods
Genus	Species	Presence	Material	Notes	Images
?Anabaria		Leangen Member.^[2]	2 valves.
Atrypina		Leangen Member.	2 shells.
?Becscia	?B. pentagona	Basal Myren Member.
Clintonella	C. aprinis	"32.5 m above the base of the Leangen Member".	Molds.
Cryptothyrella		Top of the Leangen Member at Jongsåsveien.	A pedicle valve.
Eisaella	E. minuta	Upper Myren Member and Leangen Member.
	E. uniplicata	"From basal Myren Member up to 55 m above the base".
?Glassia	?G. sp.		"Only one well-preserved specimen (PMO 87.601)".
Hindella	H. kiaeri	3–4 meters above the base of the formation at one locality at Bekkestua, in Bærum. 3 meters and 8 meters above the base of the formation at Konglungø and Vakås, respectively.		Also occurs in the Langara Formation.
Meifodia	M. prima ovalis	"Uppermost Myren and the lower parts of Padda members".
	M. prima prima	Near the base of the formation.		A atrypid.
	M. subundata	Middle part of the formation.^[3]		A atrypid.
Thulatrypa	T. gregaria	Uppermost Leangen Member.
	T. huangi	Leangen Member.
	T. vikenensis	"8–10 m above the base of the Myren Member".
	?T. sp.	Leangbukta and Skytterveien.	"PMO 113.698 (brachial mold), 153.873 (sectioned), 158.222, and 158.610, all whole valves".	A new species, may be assigned to another genus if more material becomes available.
Shelvothyris	S. bivittata	11 meters above the base of the Leangen Member.

See also

• List of fossiliferous stratigraphic units in Norway

References

• Web site: Fossilworks: Gateway to the Paleobiology Database. ((Various Contributors to the Paleobiology Database)). 17 December 2021.

Notes and References

1. Baarli . B. Gudveig . The stratigraphy and sedimentology of the early Llandovery Solvik Formation in the central Oslo Region, Norway . Norsk Geologisk Tidsskrift.
2. Baarli . B. Gudveig . 2021-08-16 . The smooth, spire-bearing brachiopods after the terminal Ordovician extinction through lower Llandovery in the central Oslo region, Norway . Journal of Paleontology . 96 . 1 . 81–111 . 10.1017/jpa.2021.72 . 0022-3360.
3. Copper . Paul . September 1995 . Five new genera of Late Ordovician-Early Silurian brachiopods from Anticosti Island, eastern Canada . Journal of Paleontology . 69 . 5 . 846–862 . 10.1017/s0022336000035526 . 0022-3360.