Deutenhausen structural analysis
A
cache
by geodirect
Hidden:
7/24/2007
Size:
 (Not chosen)
Difficulty: 
Terrain: 
(1 is easiest, 5 is hardest)
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Location:- This Earthcache is located in the Schmiedebach
River valley between the Austrian foothills and Bodensee. To access
it you should prepare yourself like a geologist with maps,
appropriate clothing and footwear (good strong hiking boots), GPS
and compass. This location is NOT RECOMMENDED for infirm, aged or
children and is probably best suited for summer-time visits. It is
recommended that access be made via a footpath from Oberbad Strasse
immediately north of Point 1 (the posted coordinates).
 
Geology:
The river cuts through a sequence of sandstones siltstones and
mudstones of the Deutenhausen beds. These rocks were laid down as
sediments in a marine or possibly a deep lake (lacustrine)
environment. They are early Tertiary in age (late Eocene to early
Oligocene, about 35 million years). They represent the early basin
fill of the North Alpine foreland basin and are about 500 metres
thick. Close inspection of the bed forms and bedding planes reveal
a number of soft sediment deformation features and sole marks /tool
marks such as shown in the photograph. The arrow shows the original
direction of sediment source.
 
These sedimentary features are formed on the bottom of bedding
planes and are therefore important indicators of the bed
attitudes (way up). Although originally deposited as flat
lying beds they are now standing close to vertical and strike about
east-west. Field geologists would record these dips as 70-80
degrees towards an azimuth of 180-190 degrees. Beds with sole
marks still on the under surface are described as 'normal' whilst
beds with the sole marks exposed on the upper surface are described
as "inverted" or "overturned".
To appreciate the forces of nature it is suggested you walk
downstream from Point 1 to Point 2: Latitude 47°25'39.15"N
Longitude 9°54'50.18"E
Along the way you will observe varying ratios of sandstone and
mudstone (indicating the variability in the environment of
deposition), numerous sedimentological / structural way-up criteria
and some very pretty river bed scenery. The structural geology is
quite simple but you should carefully check the way-up of each
outcrop as you traverse the section.
EarthCache:
To log this Earthcache you are required to describe the structural
geology of the entire section (dip strike, way up).
Additional Hints (
Decrypt
)
Decryption Key
A|B|C|D|E|F|G|H|I|J|K|L|M
-------------------------
N|O|P|Q|R|S|T|U|V|W|X|Y|Z
(letter above equals below,
and vice versa)
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Fvr züffra nhs qra synpura Sryfraboresyäpura fpunhra haq nhfneorvgra, jrypur Frvgr qvr frqvzragbybtvfpur Borefrvgr vfg haq jrypur Frvgr qvr frqvzragbybtvfpur Hagrefrvgr vfg. Qvr zrvfgra fvaq trsnyyra fb rexyäera zve snfg iregvxny, jrypur Jrvfr qvr wüatrera Sryfra… Bfgra bqre Jrfg fvaq.
(Decrypted Hints)
Find...
 Pit casts on underside of overturned bed
Point 1 outcrop
Point 2 outcrop
Sole Marks /Flute casts and Flow Direction
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Current time: 11/21/2009 3:14:37 AM
Last Updated: 11/8/2009 7:59:48 AM
Rendered: From Database
Coordinates are in the WGS84 datum
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