Jurrasic fish fossil in Solnhofen limestone

            Canon EOS 6D - f/5.6 - 1/800sec - 100 mm - ISO 320

- The Solnhofen Plattenkalk, or Solnhofen limestone, is a Jurassic Konservat-Lagerstätte that preserves a rare assemblage of fossilized organisms, including highly detailed imprints of soft bodied organisms such as sea jellies. The most familiar fossils of the Solnhofen Plattenkalk include the early feathered theropod dinosaur Archaeopteryx preserved in such detail that they are among the most famous and most beautiful fossils in the world. The Solnhofen beds lie in the German state of Bavaria (Bayern), halfway between Nuremberg (Nürnberg) and Munich (München) and were originally quarried as a source of Lithographic limestone.

During the Late Jurassic, this area was an archipelago at the edge of the Tethys Sea. This included placid lagoons that had limited access to the open sea and where salinity rose high enough that the resulting brine could not support life. Since the lowest water was devoid of oxygen, many ordinary scavengers were absent. Any organism that fell, drifted, or was washed into the lagoons from the ocean or the land became buried in soft carbonate mud. Thus, many delicate creatures avoided consumption by scavengers or being torn apart by currents. The wings of dragonflies, the imprints of stray feathers, and terrestrial plants that washed into the lagoons were all preserved. 

The fossils are not numerous, but some of them are spectacular, and their range gives a comprehensive picture of a local Jurassic ecosystem.  At times, the lagoons almost dried out, exposing sticky carbonate muds that trapped insects and a few small dinosaurs. Over 600 species have been identified, including twenty-nine kinds of pterosaur ranging from the size of a sparrow to 1.2 m (4 ft) in length.  The fine-grained texture of the mud silt forming the limestone from the Solnhofen area (which is composed mainly of the towns of Solnhofen and Eichstätt is ideal for making lithographic plates, and extensive quarrying in the 19th century revealed many fossil finds, as commemorated in the name Archaeopteryx lithographica, all the specimens of which come from these deposits.

- De Solnhofener kalksteen (Duits: Solnhofener Plattenkalk) is een geologische formatie in de Fränkische Alb (Beieren), tussen Neurenberg en München. De formatie behoort tot het Boven-Jura (ongeveer 161 tot 145 miljoen jaar oud). Deze steen is bekend om de vele zeer gedetailleerde fossielen uit het Jura, van zowel planten als dieren, die erin gevonden worden.

Taken on: September 16, 2020

Tags:

fish

vis

fossiel

Solnhofen

limestone

kalksteen

Plattenkalk

Jurassic

Jura

canon

Canon EOS 6D

Canon EF 100mm f/2.8 Macro USM

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Sets appears in: • fauna

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Camera: Canon EOS 6D, f/5.6, 1/800 sec, 100mm, ISO 320 (more info) (hide info)

Camera:	Canon EOS 6D
Aperture:	f/5.6
Exposure Time:	0.001 sec (1/800)
Focal Length:	100mm
ISO:	320
Exposure Bias:	0 EV
Flash:	Off, Did not fire
Exposure Program:	Aperture-priority AE
Exposure Mode:	Auto
Metering Mode:	Multi-segment
White Balance:	Auto
Color Space:	sRGB
Software:	PaintShop Pro 21,00
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