287 
1911-12.] Eeport on Rock Specimens. 
Among the larger specimens eight are of a reddish and yellowish sandstone, 
like the Upper Old Red Sandstone of Dunnet Head and Hoy. 
A specimen of limestone with crinoids probably represents the Carboni- 
ferous Limestone, while two specimens of clay ironstone, one filled with the 
shells of lamellibranchs, being a regular “ mussel band ironstone,” are 
probably of Carboniferous age. The furthest north occurrences of such 
rocks in situ on the east coast of Scotland is in Fife, where they pass out 
to sea at the “ East Neuk.” 
The Jurassic formation is probably represented by five fragments of 
fossiliferous rock. One of these is a fine-grained dark grey limestone with 
lamellibranchs and other fossils, another dark limestone has casts of corals 
like Montlivaultia, one contains a reticulate sponge, while another is 
oolitic, like a specimen from Station 2. 
To the Cretaceous formation belong two small pieces of chalk, seventeen 
chips of chalk flint and several of hard grey sandy rock crowded with 
fossils, one showing the section of a cidarid spine, and, more doubtfully, 
one specimen of cherty rock with worm-tubes, and another fragment of flinty 
rock with sponge spicules. 
Jurassic and Cretaceous rock capable of supplying the assemblage of 
stones from this haul and that from Station 2 occur either in situ or as 
large ice-transported masses on both shores of the Moray Firth, and are 
known to extend out to sea to the east. 
Metamorphic rocks are represented by eighty-seven small pieces of 
hornblende-gneiss, hornblende-biotite-gneiss and biotite-gneiss of Cape 
Wrath type of the Lewisian Gneiss. The Moine schists are represented by 
about fifty specimens, chiefly quartz-granulites with muscovite, like rocks 
near the Moine thrust-plane. One is a “ frilled schist ” like that occurring 
with the “ Mylonites.” Some, however, are in a higher state of crystallisa- 
tion, and represent the biotite-granulites and muscovite-biotite-gneiss that 
occur further to the east. 
Igneous rocks bear a very small proportion to the others. Only two 
are plutonic, one of granite, and one of gabbro. Dyke rocks are represented 
by one specimen of porphyrite. There are fourteen fragments of dolerite, 
some of which bear amygdules filled with zeolites and are probably 
basic lavas, while others are more probably intrusive. 
Of doubtful age and origin are eleven specimens of vein quartz and one 
of reddish marble. 
