File:Fossil Crinoid - geograph.org.uk - 1393236.jpg

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Fossil_Crinoid_-_geograph.org.uk_-_1393236.jpg ‎(640 × 491 pixels, file size: 277 KB, MIME type: image/jpeg)

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Description
English: Fossil Crinoid Crinoids are primitive animals, related to modern feather stars, but with a stalk and five branching arms called brachia. The stalk consists of a column of calcite discs. Fragments of crinoids are common in Palaeozoic limestones, but their exoskeletons are fragile so complete ones, like this one, are comparatively rare. The five pence coin is for scale.
Date
Source From geograph.org.uk
Author Anne Burgess
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InfoField
Anne Burgess / Fossil Crinoid / 
CC BY-SA 2.0
Anne Burgess / Fossil Crinoid
Camera location54° 52′ 15″ N, 3° 36′ 17″ W  Heading=270° Kartographer map based on OpenStreetMap.View this and other nearby images on: OpenStreetMapinfo
Object location54° 52′ 15″ N, 3° 36′ 17″ W  Heading=270° Kartographer map based on OpenStreetMap.View this and other nearby images on: OpenStreetMapinfo
This image has currency in it to indicate scale.

Using coins for scale is discouraged as it will require people unfamiliar with them to look up the dimensions or guess, both of which defeat the purpose of the object in the first place. Coins can also reinforce a geographical bias, and some coins' designs are copyrighted.

Ideally, a photograph should include a ruler with the subject (example) or an added scale marking. SI ("metric") units are the most commonly used worldwide (see meter and centimeter).

Images with coins to indicate scale

Common coin diameters for reference:

  • U.S. dollar (as of?):
    • 1¢: 19.05 mm, 0.75 in
    • 5¢: 21.21 mm, 0.84 in
    • 10¢: 17.91 mm, 0.71 in
    • 25¢: 24.26 mm, 0.94 in
    • 50¢: 30.61 mm, 1.22 in
    • $1: 26.5 mm, 1.02 in
  • Canadian dollar (as of?):
    • 1¢: 19.05 mm, 0.75 in
    • 5¢: 21.2 mm, 0.83 in
    • 10¢: 18.03 mm, 0.71 in
    • 25¢: 23.88 mm, 0.94 in
    • 50¢: 27.13 mm, 1.07 in
    • $1: 26.5 mm, 1.02 in
    • $2: 28 mm, 1.1 in
  • Pound sterling as of 2021:
    • 1p: 20.32 mm, 0.8 in
    • 2p: 25.91 mm, 1.02 in
    • 5p: 18 mm, 0.71 in
    • 10p: 24.5 mm, 0.96 in
    • 20p: 21.4 mm, 0.84 in
    • 50p: 27.3 mm, 1.07 in
    • £1: 23.03–23.43 mm, 0.91–0.92 in
    • £2: 28.4 mm, 1.12 in
  • Euro as of 2002:
    • 1c: 16.25 mm, 0.64 in
    • 2c: 18.75 mm, 0.74 in
    • 5c: 21.25 mm, 0.84 in
    • 10c: 19.75 mm, 0.78 in
    • 20c: 22.25 mm, 0.88 in
    • 50c: 24.25 mm, 0.95 in
    • €1: 23.25 mm, 0.92 in
    • €2: 25.75 mm, 1.01 in

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This file is licensed under the Creative Commons Attribution-Share Alike 2.0 Generic license.
Attribution: Anne Burgess
You are free:
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Under the following conditions:
  • attribution – You must give appropriate credit, provide a link to the license, and indicate if changes were made. You may do so in any reasonable manner, but not in any way that suggests the licensor endorses you or your use.
  • share alike – If you remix, transform, or build upon the material, you must distribute your contributions under the same or compatible license as the original.

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Date/TimeThumbnailDimensionsUserComment
current22:00, 28 February 2011Thumbnail for version as of 22:00, 28 February 2011640 × 491 (277 KB)GeographBot (talk | contribs)== {{int:filedesc}} == {{Information |description={{en|1=Fossil Crinoid Crinoids are primitive animals, related to modern feather stars, but with a stalk and five branching arms called brachia. The stalk consists of a column of calcite discs. Fragments of

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