Blackland

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

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

reported by

cc: 1991

Place

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

coordinate

51.416317, -1.984708 — place, ±2,000 m, by os_open_names, from the cc record

on a map

OpenStreetMap

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 63e2513d— 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

Merefa 5 December 1990, Merefa

next

Millersburg February 1991, Millersburg

previous in UK

Beacon Hill 30 August 1990

next in UK

Alton Barnes 18 April 1991

same day

Ulm (Ulm) · JP19910133_A · Donderen (Donderen) · Bareham (Bareham) · Amersham (Amersham) · Beckhampton (Beckhampton) · Bryn-y-Maen (Bryn-y-Maen) · Bryn-y-Maen (Bryn-y-Maen) · Caernarfon (Caernarfon) · Clench Common (Clench Common) · Clench Common (Clench Common) · Crawley (Crawley) · Crawley (Crawley) · Crawley (Crawley) · Downham Market (Downham Market) · Froxfield (Froxfield) · High Wycombe (High Wycombe) · Longstock (Longstock) · Newhaven (Newhaven) · Sapperton (Sapperton) · South Malling (South Malling) · Sparsholt (Sparsholt) · Sparsholt (Sparsholt) · Steeple Langford (Steeple Langford) · UK19911333_W (Wiltshire) · UK19911333_X (Yorkshire) · UK19911333_Y · US19910101_A · Charles River (Charles River)

within 7 days and 25 km

Beckhampton 1991, 7.7 km away · Clench Common 1991, 16.3 km away · Clench Common 1991, 16.3 km away

In place

The nearest formations the archive can place.

Blackland5 September 1987
Blackland
0 m away, 1987-09-05 Blackland1 June 1990
Blackland
0 m away, 1990-06-01 Blackland2 June 1990
Blackland
0 m away, 1990-06-02 Blackland2 June 1990
Blackland
0 m away, 1990-06-02 Blackland14 June 1990
Blackland
0 m away, 1990-06-14 Blackland28 June 1991
Blackland
0 m away, 1991-06-28

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/UK19911333_D.json · row in index/manifest.jsonl

input digests

entity 82b8759fb7a5 · images a848ec4e46cb · texts 4f53cda18c2b · geo 1c0281b77606