The Sanddunez of Lorze EarthCache
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The Dune field of Lorsch
The Formation
The geological substrate consists of shifting sand. At the end of the last ice age about 10,000 – 15,000 years ago, it was blown out from the dirt fields of the River Rhine, the old Neckar and the River Main and blown to the locally inland.
The Process
A dune is a hill of sand built by aeolian processes. Dunes occur in different forms and sizes, formed by interaction with the wind. Most kinds of dunes are longer on the windward side where the sand is pushed up the dune and have a shorter "slip face" in the lee of the wind. The valley or trough between dunes is called a slack. A "dune field" is an area covered by extensive sand dunes.
Aeolian processes pertain to the activity of the winds and more specifically, to the winds' ability to shape the surface of the Earth. Winds can erode, transport, and deposit materials, and are effective agents in regions with sparse vegetation and a large supply of unconsolidated sediments. Although water is a much more powerful eroding force than wind, aeolian processes are important in arid environments,The term is derived from the name of the Greek god, Æolus, the keeper of the winds.
The Sand
Sand is a naturally occurring granular material composed of finely divided rock and mineral particles. The most common constituent of sand, in inland continental settings and non-tropical coastal settings, is silica (silicon dioxide, or SiO2), usually in the form of quartz, which, because of its chemical inertness and considerable hardness, is the most common mineral resistant to weathering.
The Flora and Fauna
Sand areas due to drought, heat, low soil nutrient poverty and developing habitat for a variety of endangered animal and plant species of European importance.
By settlement expansion and road construction, much of the sand was lost.
The Protection
Next to the dune there is the river bed of the Weschnitz which is surrounded by 5 meter high barrages to prevent the area from high-water.
To log this Earthcache please answer the following questions by checking the nearby info-board:
1) What's the local vicinity and especially the dune called?
2) How long is the "Riedlinie"?
3) What's the name of the nearest "Kloster" to the right of the current localtion?
Please take a picture of yourself or your GPS at the site (this is a volunteer rule).
Lorscherisch:
er stejt uffem bersch aus eiszedlichem Flugsänd, ach dühhn genennt. ugfair 10 - 15 dausend jor weg is des vom maa hergeblose wonn der dräck. uffgehäifft hat sich der dreck donn zu en dühhn vum wind.
sond is sio2 orrer siliziumdioxidd. ausser sanhose lewe uff de dühhn ach noch onnere geferdede spezies. des kennder awwe im knibbelknail selwer läse.
um zu logge braicht ich andwodd uff die froche - guggt oafach uff des schild:
1) Wie hasdn der Buggel do?
2) Wie loang is die "Riedlinie"?
3) Wie hasdn des Kloschder reschds auf den Kard?
Deutsch:
Hier steht ihr an einer eiszeitlichen Flugsanddüne. Sie entstand vor 10-15000 Jahren. Der Sand (SiO2 oder Siliziumdioxid) wurde vom Main hierhergeweht und durch Wind aufgetürmt.
Wind- und Wassererosion formten die Düne weiter aus.
Um die Düne zu loggen, beantwortet bitte folgende Fragen:
1) Wie heißt die Düne?
2) Wie lange ist die "Riedlinie"?
3) Wie heißt das rechts auf der Karte abgebildete Kloster?
Über ein Foto von euch bei der Düne würde ich mich freuen.
ihr könnt direkt loggen. Wenn etwas falsch ist, melde ich mich.
Viele Grüße
-helixrider-
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