Past and future
|[Notas - Normas] Nota do Artista [Francês]|
The beginning of the Tertiary is characterized by continental sedimentation of calcareous deposits found in the scrublands of Prades le lez, near Montpellier. Shallow seas and lakes invaded the west of the Hérault between 55 and 45 million years to the Eocene. The sediments that we see in this photograph are from this period.
Thereafter, it will be a succession of mountain formation between 40 and 35 million years, which will collapse (34 to 23 million years) and give way to the Miocene sea (23 to 12 million ' years) up to the gates of Montpellier, perched on a hill. In some parts of the city, it was easy to find shellfish sediments (in the 60's, behind the Lycée Joffre as an example, in the lower part of the city) left by the sea and rich in fossils (shell limestone and molasses).
At the end of the Miocene between 12 and 3 million years sea leaves the Hérault at first, then comes back, then finally leaves before the end of the Pliocene, never to return until now: the sea is partly replaced by lakes and lagoons still present.
For the future it is likely that the sea will return, leaving Montpellier isolated on the hill.
The photograph was taken in a bed of a small river. Early afternoon, a slightly rainy weather. The lighting conditions were not ideal.
Camera in aperture priority mode, focal length 50 mm aperture at f/5.6 on ISO-200. With these parameters the speed was calculated at 1 / 30 th of a second. Use of the tripod.
horias, CatherineD, matatur marcou esta nota como útil
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- [2010-01-30 0:55]
What a lovely capture this old rocks and a beautiful flower!
Details are very sharp and colors are wonderful.
Très intéressante photo, avec de jolies couleurs et contrastes bien rendus, malgré le temps couvert. Une note très intéressante aussi... qui me rappele que je cherchais aussi des coquillages entre les couches de schiste dans le village de mon enfance en Belgique... J'en ai encore une boîte pleine! Bon week-end,
A real fine looking detail of those calcareous strata Philippe, the diffuse illumination of a rainy day produced an almost shadowless image in great structural detail with true-to-life colours. Very good geological study with a perfect note MF.