Paramoudra on chalk outcrop - geograph.org.uk - 792764

Autor/Urheber:

Evelyn Simak

Shortlink:

https://dewiki.de/b/32d6d9

Quelle:

Wikimedia Commons

Größe:

480 x 640 Pixel (210022 Bytes)

Beschreibung:

Paramoudra on chalk outcrop. Flint nodules such as the one seen here are called paramoudras, also known as pot stones. These large nodules originally had a central core filled with chalk. Once exposed, the soft chalk is quickly washed out by wave action, leaving a large hole. One can occasionally spot pot stones in gardens where they serve as natural planters. – The chalk layer is only visible at low water. It is composed of calcium carbonate from the remains of microscopic marine organisms that once lived in a warm shallow sea which covered this area between 62 and 132 million years ago. Its upper few centimetres are composed of fragments of rocks.

http://www.chesterfieldlodge.fsnet.co.uk/Geology/west%20runton-east%20runton.htm

http://www.museums.norfolk.gov.uk/default.asp?document=400.500.100.025

Kommentar zur Lizenz:

Dieses Bild stammt aus der Sammlung des Projektes „Geograph British Isles“. Siehe die Seite der Fotografie für Kontaktinformationen. Das Urheberrecht dieses Bildes liegt bei Evelyn Simak und ist lizenziert unter der Creative Commons Namensnennung-Weitergabe unter gleichen Bedingungen-2.0-Lizenz.

Lizenz:

CC BY-SA 2.0

Credit:

From geograph.org.uk

Bild teilen: