Garron Point reveals evidence of a geological process referred to as rotational slip.
Rotational slips are a well known phenomenon around the edge the Antrim Plateau.
Under the basalt-capped plateau is a thick layer of Chalk,
beneath which is Lias Clay.
The slippage that occurred here dates back
to the end of the last ice age ,
when the Scottish ice sheets were in retreat.
The ice had eroded and over-stepped
the Antrim Plateau escarpments in parts
and this led to the instability.
This instability was exacerbated
by the soft Jurrasic mudstones
which underlay the chalk and basalt.
As a result Garron Point is a good site
to view blocks of black basalt at the same level
as the Cretaceous chalk.
To claim this Earthcache , please :
1. Waypoint 1 at N55 02.621 W005 57.827
From this point look to the north - How many slips can you see ?
Describe the slips in your own words.(Color, shape, ...)
2. When was the last ice age ? (research)
The sign at waypoint 2 seems to be gone.
From now on please answer only questions 1 + 2, until the sign is back.
If you are interested in answers for questions 3 + 4 - please have a look at the spoiler pictures :
https://coord.info/GLZTW4BP
3. Waypoint 2 at N55 02.657 W005 57.878
What does the Chalk contain ?
4. There is another geological phenomenon standing on
the inland side of the Coast Road just north of Garron Point.
What is the name given to it ?
What type of stone is it ?
Please send the answers to my Geocaching-Profile http://coord.info/PR9PJJ8
You can log your find immediately,
I will contact you if something is wrong.
Logs without answers will be deleted.
Don't post any answers in your log !
Parking near to Waypoint 2 - there is a limit to 6 feet of height !