Maar
Query URLs
https://term.museum-digital.de/md-de/tag/5261
- Note
- "A maar is a broad, low-relief volcanic crater caused by a phreatomagmatic eruption (an explosion which occurs when groundwater comes into contact with hot lava or magma). A maar characteristically fills with water to form a relatively shallow crater lake which may also be called a maar. The name comes from a Moselle Franconian dialect word used for the circular lakes of the Daun area of Germany.
Maars are shallow, flat-floored craters that scientists interpret as having formed above diatremes as a result of a violent expansion of magmatic gas or steam; deep erosion of a maar presumably would expose a diatreme. Maars range in size from 60 to 8,000 m (200 to 26,250 ft) across and from 10 to 200 m (33 to 656 ft) deep; most maars commonly fill with water to form natural lakes. Most maars have low rims composed of a mixture of loose fragments of volcanic rocks and rocks torn from the walls of the diatreme." - (en.wikipedia.org 29.02.2020)
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Frosch - cf. Messelobatrachus
Völlständig erhaltenes...
Object information
Image: Naturhistorisches Museum Mainz / Landessammlung für Naturkunde Rheinland-Pfalz - CC BY-NC-SA -
Blütenstand einer Pflanze aus der Familie Chloranthaceae
Blütenstand einer Pflanze aus...
Object information
Image: Naturhistorisches Museum Mainz / Landessammlung für Naturkunde Rheinland-Pfalz - CC BY-NC-SA -
Blütenstand einer unbekannten Pflanze aus dem Eckfelder Maar
Der hier gezeigte Blütenstand...
Object information
Image: Naturhistorisches Museum Mainz / Landessammlung für Naturkunde Rheinland-Pfalz - CC BY-NC-SA -
Frucht der Gattung Trilobium
Vierflügelige Frucht der...
Object information
Image: Naturhistorisches Museum Mainz / Landessammlung für Naturkunde Rheinland-Pfalz - CC BY-NC-SA -
Kletterfarns - Lygodium kaulfussi
Sorophorenstand des...
Object information
Image: Naturhistorisches Museum Mainz / Landessammlung für Naturkunde Rheinland-Pfalz - CC BY-NC-SA
References
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