Версия от 15:10, 21 марта 2024; EducationBot(обсуждение | вклад)(Новая страница: «{{Английская Википедия/Панель перехода}} {{Short description|Nature reserve in North Hertfordshire}} {{Use dmy dates|date=April 2022}} thumb '''Hill End Pit''' (also called '''Hill End Farm Pit''' or '''Hitch Wood Pit''')<ref name="A Geological Conservation Strategy for Hertfordshire"/> is a {{convert|0.7|hectare|acre|adj=on}} nature reserve on the site of a former chalk pit, in [[St Paul's Walden]...»)
(разн.) ← Предыдущая версия | Текущая версия (разн.) | Следующая версия → (разн.)
This pit is of national stratigraphic and international palaeontological importance, but has lost its original SSSI status and is now very degraded. It is the type locality of the Hitch Wood Hardground at the top of the Chalk Rock. This hardground is exceptionally fossiliferous here, and has probably yielded more fossils of all groups (notably ammonites) than any other Chalk Rock locality apart from the Kensworth Chalk Pit GCR site, Bedfordshire.[1][4]
The site gives its name to the siliceous sponge genus Hillendia, and is the type locality of the genus, and two fossil ammonite species, Subprionocyclus hitchinensis and Subprionocyclus branneri have been described from this site after being discovered there.[1]
It is shown on the Natural England Magic map as one of the "Geological places to visit".[5]
The site is located off a track leading from Hitchwood Lane to Hill End Farm Lane. It is difficult to find, but the site noticeboard is visible through a gap in the hedge on the left hand side of the track.