|
Rocks and Minerals named after localities in Mull:
This page lists those rocks and minerals which have been
either named after Mull localities or which are found in
other localities near to Mull. Many of the rocks in the
"other localities" category are also to be found in Mull
itself. There is a
Gallery page
showing examples of the type listed below.
Benmoreite is
a type of basalt. The name is not used in the Memoir -
it was originally described as a Mugearite (qv). The
type locality is Ben More, in the very centre of the
island of Mull. On the latest geological maps, the
benmoreite is clearly identified in yellow and it is
actually quite easy to find in the field. It occurs in
several places but perhaps the best place is about 3/4
of the way up Ben More itself. The rock is fairly
distinctive - it has a "platy" appearance. The start of
the band is not particularly clear, but where it ends,
the slope steepens up to the final summit ridge. If you
compare the geological map with the Landranger or
Explorer, you will see what I mean.
Craignurite is found near Craignure (Creag an
Iubhair in Gaelic) where the ferry from Oban comes in.
It is extremely easy to find as it forms the rocks of
the shore at the pier. It is a light grey, very hard,
felsitic type of rock, related to granophyre and
frequently shows flow structures. At Craignure it forms
a cone sheet. The reader is referred to the Geologists
Association Guide to the Mull Tertiary as there is a
good excursion described which gives a lot of
information on this rock. See the Resources page for
information about this book.
Craigite
is a porphyritic dolerite which forms part of the Ben
Buie Gabbro. It is named after Craig Cottage in Glen
More. It was first named after this locality. The writer
has only seen the name "craigite" mentioned in the GA
Guidebook - elsewhere it is simply described
as a dolerite. As is the case with craignurite above,
there is an excursion in the GA guide describing it, but
unfortunately, since the book was written, a lot of
forestry has sprung up making the walking something of a
challenge!
Leidleite Named after Glen Leidle (the Glen that
runs down to Carsaig) in Mull this is a form of andesite.
Tobermorite is a whilte mineral first discovered
by the legendary Professor Heddle near Tobermory. It is
orthorhombic, white or light pink in colour with a
hardness of 2½ on the Mohs Scale. More information is
available on the Mindat web pages:
www.mindat.org/min-3985.html
Mullite
is a
mineral that was first discovered in 1924 near Seabank
Villa on Loch Scridain. Orthorhobic, its hardness is 6 -
7 and is white or pink in colour. It is an aluminium
silicate. There is an article with information about its
uses on this site:
www.azom.com/details.asp?ArticleID=951 . Spot the
deliberate error - "Isle of Mull off the English
coast!!"
Other
examples of rocks and minerals named after locations
close to Mull:
Inninmoreite
Kilchoanite
Sannaite
Allivalite
Harrisite
Mugearite
Marscoite
Crinanite
Kentallenite
Appinite
Strontianite
Back to the Glossary Page |