Clench Common

Images

1 image(s) on this formation's own source records. Click a tile for the full image; the bytes are fetched when you ask for them and are not stored in this page.

Diagrams (1)

diagram cropcirclecenter.com / Bertold Zugelder site default

Date

15 August 1991, to day precision. What a source records is the day a formation was found and reported.

reported by

cc: 15 August 1991

weekday

Thursday, day 227 of the year, ISO week 33, summer

sun and moon

39.0 days before the September equinox; moon waxing crescent (33% lit), 9.9 days before the full moon (computed at 12:00 UTC; a reported date is a discovery date, not a creation date)

Place

What each source printed, and the coordinate derived from it. No source in this archive publishes a coordinate of its own.

coordinate

51.389929, -1.753105 — place, ±2,000 m, by os_open_names, from the cc record

on a map

OpenStreetMap

Crop and size

crop

not recorded (cc: —)

diameter

255 ft (77.7 m)

size as written

78 m | 255 ft

Source records

What each source published, side by side. A row whose values differ across the sources is marked: the archive prints the disagreement rather than choosing a winner.

Geometry

1 diagram file(s) on this page. measured from the diagram itself, and experimental: the extractor's rotational order is right on 88.8 % of a 200-diagram hand-labelled set against a gate of 90 %, so read a number here beside the picture rather than instead of it.

Experimental, and marked ≈ wherever it appears. These numbers are read off a drawing, not off the field: the extractor's rotational order agrees with a hand-labelled set on 88.8 per cent of 200 diagrams against a gate of 90 per cent, its element count is within one on 97.5 per cent, and its ring count is not calibrated at all. Nothing in the analysis tree is derived from the rotational order while that gate is unmet.

Diagrams that look like these: cc 2e1a8319— the nearest by perceptual hash. The whole archive is browsable by shape in the shape section, and this formation's own diagrams go straight into that grid: show them in the grid.

Neighbours

In time

previous

Ravensden 14 August 1991, Ravensden

next

Cheesefoot Head 16 August 1991, Cheesefoot Head

previous in UK

Ravensden 14 August 1991

next in UK

Cheesefoot Head 16 August 1991

same day

Devil's Dyke (Devil's Dyke) · Guyhirn (Guyhirn)

within 7 days and 25 km

Alton Priors 22 August 1991, 7.0 km away, 7 day(s) apart · Avebury 10 August 1991, 8.3 km away, 5 day(s) apart · Beckhampton 9 August 1991, 9.0 km away, 6 day(s) apart · Beckhampton 9 August 1991, 9.0 km away, 6 day(s) apart · Beckhampton 9 August 1991, 9.0 km away, 6 day(s) apart

In place

The nearest formations the archive can place.

Clench Common1991
Clench Common
0 m away, 1991 Clench Common1991
Clench Common
0 m away, 1991 Clench CommonJuly 2000
Clench Common
0 m away, 2000-07 Martinsell11 August 2000
Martinsell
1.9 km away, 2000-08-11 Martinsell Hill19 July 2007
Martinsell Hill
1.9 km away, 2007-07-19 Martinsell Hill28 July 2008
Martinsell Hill
1.9 km away, 2008-07-28

same county and year

Alton Barnes April 1991 · Alton Barnes 18 April 1991 · Mardon Cowbag May 1991 · Yarnbury Castle 13 May 1991 · Marden 27 May 1991 · Whiteparish 27 May 1991 · Whiteparish 27 May 1991 · Whiteparish 27 May 1991 · Avebury Trusloe 9 June 1991 · Avebury Trusloe 14 June 1991 · Avebury Trusloe June 1991 · Beckhampton 18 June 1991 · Stonehenge 18 June 1991 · Beckhampton 20 June 1991 · Lockeridge 21 June 1991 · Avebury Trusloe 22 June 1991 · Blackland 28 June 1991 · Morgans Hill 28 June 1991 · Roundway Devizes 28 June 1991 · Lurkeley Hill 29 June 1991 and 67 more

Provenance

entity built at

2026-09-11T19:20:39Z (derived from the link decisions, not from this build)

index run ids

none

reviews applied

none

open queue pairs

none

entity record

index/formations/UK19910815_B.json · row in index/manifest.jsonl

input digests

entity 3a57e24fb195 · images 8b1a01f367c0 · texts 4f53cda18c2b · geo 3109b5166b9c