The town's name in Irish Coireán refers to the shape of Ballinskelligs Bay on which the town sits; the name, however, has been transplanted onto the lake with the Irish name being Loch Luíoch or Loch Luidheach.
If you arrive, you can see a beach with a nice view. The beach is made of cobble. A A cobble (sometimes a cobblestone) is a clast of rock defined on the Udden–Wentworth scale as having a particle size of 64–256 millimeters (2.5–10.1 in), larger than a pebble and smaller than a boulder. Other scales define a cobble's size in slightly different terms. A rock made predominantly of cobbles is termed a conglomerate. Cobblestone is a building material based on cobbles.
Cobbles, also called cobblestones, derive their name from the word cob, meaning a rounded lump. The term is further related to the German Kopf, meaning head. Chester Wentworth referred to cobbles as cobble bowlders [sic] in his 1922 paper that would become the basis for the Udden–Wentworth scale.
Within the widely used Krumbein phi scale of grain sizes, cobbles are defined as clasts of rock ranging from −6 to −8 φ. This classification corresponds with the Udden–Wentworth size scale which defines cobbles as clasts with diameters from 64–256 millimeters (2.5–10.1 in). On this scale, cobbles are larger than pebbles which measure 4–64 millimeters (0.16–2.52 in) in diameter and smaller than boulders, whose diameters range from 256–4,096 millimeters (10.1–161.3 in). On the Udden–Wentworth scale, an unlithified fraction of cobbles is classified as gravel while a lithified sample primarily composed of cobbles is a conglomerate. The Committee on Sedimentation of the US National Research Council has recommended that in situ cobbles be identified by their process of origination, if possible (e.g. cobbles by disintegration, by exfoliation, etc.).
In the late 1800s and early to mid-1900s, prior to the Udden–Wentworth scale's widespread adoption, size classifications tended to group all particles larger than 2 millimeters (0.079 in) together as gravel or stones. Other scales have defined the size of a cobble slightly differently than the Udden–Wentworth; the British Standards Institution denotes a cobble as any clast ranging in diameter from 60–200 millimeters (2.4–7.9 in) while the United States Department of Agriculture's definition suggests a range of 75–250 millimeters (3.0–9.8 in) and the ISO standard 14688 names cobbles as ranging from 63–200 millimeters (2.5–7.9 in) in diameter.
Various attempts have been made to refine the Udden–Wentworth scale, including its definition of cobbles. In 1968, D. J. Doeglas proposed subdividing the cobble designation into two fractions, small cobbles (for particles with diameters from 64–125 millimeters [2.5–4.9 in]) and large cobbles (for particles with diameters from 125–250 millimeters [4.9–9.8 in]). A 1999 paper by Terence C. Blair and John G. McPherson argued that the Udden–Wentworth and Krumbein scales betrayed a historical emphasis on the study of sand grains while ignoring larger gravel grains. They proposed defining fine cobbles as those with diameters from 64–128 millimeters (2.5–5.0 in) (−6 to −7 φ) and coarse cobbles as those with diameters from 128–256 millimeters (5.0–10.1 in) (−7 to −8 φ). In 2012, Simon J. Blott and Kenneth Pye suggested that the cobble designation be eliminated altogether, replaced by very small boulder and small boulder designations equivalent in size to Blair and McPherson's fine and coarse cobbles, respectively. [source: https://en.wikipedia.org/wiki/Cobble_(geology)]
Now to the questions:
1. How different are the cobbles you find in their size? How big are the smallest ones and how big the biggest? (Estimation)
2. How many different colors have the cobbles on the beach? Describe them. Try to assign every color a rock type.
3. Do you think that the hills surrounding the bay have any impact to the...
a) size
b) form
c) color
... of the cobbles?
4. (Optional) take a picture of the cobbles, other people stacked on top of each other.
Send me your answers and you can log, you don't have to wait for a message. Have fun!
(Sources: wikipedia.org