South Småland peneplain

300px|thumb|upright=1.35|View of the South Småland peneplain at [[Store Mosse National Park. Note the residual hill or inselberg in the background.]] The South Småland peneplain (Swedish: Sydsmåländska peneplanet) is a large flattish erosion surface, a peneplain, formed during the Tertiary, covering large swathes of southern Småland and nearby areas in Southern Sweden.^[1][2] To the east the South Småland peneplain bounds with the Sub-Cambrian peneplain uphill across an escarpment.^[3] While is almost as flat as the Sub-Cambrian peneplain the South Småland peneplain differs in that it contains far more residual hills and that it has never been covered by sedimentary rocks.^[3][2] To the south and west (chiefly Halland and Blekinge) the peneplain transitions into Mesozoic-aged hilly surfaces.^[2]

In a 2013 study the surface is described as extending over an altitude range of 100 to 150 meters above sea level,^[2] while in a subsequent 2017 study the main surface is said to range from 175 to 125 m a.s.l. with a lower level at 100 m a.s.l. existing in near the Blekinge-Småland border.^[4] The South Småland peneplain is the lowest surface in a piedmonttreppen or staircase of erosion surfaces that make up the South Swedish Dome. The level immediately above it is the 200 m peneplain, that is then followed by the 300 m peneplain and the crestal portion of the Sub-Cambrian peneplain.^[4]

The western part of the peneplain is drained by the river Nissan while Bolmån drains the southwest. Mörrumsån drains eastern parts of peneplain.^[3] It is possible that the Kvärkabäcken and Skäralid streams that traverses the Söderåsen horst in Scania are old antecedent rivers that once flowed through the South Småland peneplain.^[5]

The existence of this plain was first noted by Sten De Geer in 1913 who termed it Smålands urbergslätt.^[2]

See also

• Norrland terrain

References

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