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EarthCache

Millenium Standing Stone

A cache by Gandalfdb Send Message to Owner Message this owner
Hidden : 4/2/2018
Difficulty:
1.5 out of 5
Terrain:
1.5 out of 5

Size: Size: other (other)

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Geocache Description:




Millenium Standing Stone





Giant 'fingers pointing to the future' in the form of granite standing stones has been erected in each parish of Jersey.




This millenium stone at the Havre des Pas promenade St. Helier is worth a closer look.







Granite

Granite is a intrusive igneous rock.
It is formed by slow crystallization of magma below Earth's surface.
Granite consits mainly of quartz and feldspar with amounts of mica, amphiboles, and other minerals.
This mineral composition usually gives granite a red, pink, gray, or white color with dark mineral grains visible throughout the rock.




Veins

Veins are parts of crystallized minerals inside of a rock.
The veins can be formed by filling up open spaces within the rock or by crack sealing.




Color

Pink grains are orthoclase feldspar.
White grains are plagioclase feldspar.
Clear, slightly transparent grains are quartz.
Black grains can be mica, biotite or hornblende.
Many other minerals can be present in granite.







Here you can find two different examples of granite next to each other.

To log your find, please send me a Mail with the answers to following questions :




Waypoint 1 - Millenium Standing Stone

1. Is the surface rough or fine ?
What is the main color of the stone ?

2. Now walk around the stone and have a closer look - what colors can you find ?

3. Is the vein straight or are there any interruptions ?

4. Tell me the average thickness of the vein.

Waypoint 2 - The happy dolphin

5. Is the surface rough or fine ?
What is the main color of the stone ?

6. Try to estimate the percentage proportions of feldspar, quartz and other (black) minerals.

Photos are welcome but optional




You can log your find after sending me a Mail with your answers.
You don‘t have to wait for my reply, I will contact you if something is wrong.
Logs without any answers will be deleted.




Additional Hints (No hints available.)



 

Find...

36 Logged Visits

Found it 34     Write note 1     Publish Listing 1     

View Logbook | View the Image Gallery of 19 images

**Warning! Spoilers may be included in the descriptions or links.

Current Time:
Last Updated: on 7/20/2018 5:26:15 AM Pacific Daylight Time (12:26 PM GMT)
Rendered From:Unknown
Coordinates are in the WGS84 datum

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