Tophill
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{{about|the place in Dorset|the place in Bedfordshire|Tophill, Luton}}
{{refimprove|date=August 2020}}
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Tophill is a gently sloping area of land on the Isle of Portland in Dorset, England, rising from sea level at Portland Bill to {{convert|151|m|ft|0}} near HMP The Verne at its northern end. On Tophill are five of the settlements on the island: Easton, Weston, Southwell, the Grove and Wakeham. Portland stone lies under Tophill, and the strata decline at a shallow angle of around 1.5 degrees from their peak down to sea level. {{cite web | year = 2007 | url = http://www.soton.ac.uk/~imw/portnew.htm#cross | title = General Geology | publisher = Southampton University | accessdate = 26 July 2007}} The lower northern end of the island is called Underhill.
Image:Chesil Beach from New Ground.jpg from New Ground, showing much of Underhill]]
In the north-west corner of Tophill is Tout Quarry, whilst the nature reserve King Barrow Quarry lies at the north-east. Near the northernmost point lies the area known as New Ground used as a lookout point, in front of which sits the Portland Cenotaph.
{{coord|50.5496|N|2.4361|W|type:landmark_region:GB|display=title}}