Tophill is a gently sloping area of land on the

Isle of Portland An isle is an island, land surrounded by water. The term is very common in British English. However, there is no clear agreement on what makes an island an isle or its difference, so they are considered synonyms. Isle may refer to: Geography * ...

Dorset Dorset ( ; archaically: Dorsetshire , ) is a county in South West England on the English Channel coast. The ceremonial county comprises the unitary authority areas of Bournemouth, Christchurch and Poole and Dorset. Covering an area of ...

, England, rising from sea level at

Portland Bill Portland Bill is a narrow promontory (or bill) at the southern end of the Isle of Portland, and the southernmost point of Dorset, England. One of Portland's most popular destinations is Portland Bill Lighthouse. Portland's coast has been notorio ...

to near HMP The Verne at its northern end. On Tophill are five of the settlements on the island: Easton,

Weston Weston may refer to: Places Australia * Weston, Australian Capital Territory, a suburb of Canberra * Weston, New South Wales * Weston Creek, a residential district of Canberra * Weston Park, Canberra, a park Canada * Weston, Nova Scotia * ...

, Southwell, the Grove and Wakeham.

Portland stone Portland stone is a limestone from the Tithonian stage of the Jurassic period quarried on the Isle of Portland, Dorset. The quarries are cut in beds of white-grey limestone separated by chert beds. It has been used extensively as a buildi ...

lies under Tophill, and the strata decline at a shallow angle of around 1.5 degrees from their peak down to

sea level Mean sea level (MSL, often shortened to sea level) is an average surface level of one or more among Earth's coastal bodies of water from which heights such as elevation may be measured. The global MSL is a type of vertical datuma standardise ...

. The lower northern end of the island is called Underhill. In the north-west corner of Tophill is Tout Quarry, whilst the nature reserve

King Barrow Quarry King Barrow Quarry is a disused site of former 19th century stone quarries on the Isle of Portland, Dorset, England. It is located in the north-east corner of Tophill. The quarry, now a Dorset Wildlife Trust nature reserve, covers 12.2 hectares. ...

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.

References

Isle of Portland {{Dorset-geo-stub