926 DR ROBERT CAMPBELL ON 
divisions : (1) “ the Jasper and Green-rock series,” probably of Arenig age, and (2) “the 
Margie series” resting unconformably in the former. They are always separated from 
the schists by a thrust plane and from the Old Red Sandstone by the Highland 
boundary fault. Further reference to Mr Barrow’s paper will be made in connection 
with the description of another area of Highland Border rocks near Stonehaven. 
The present paper deals with the stratigraphy of the paleeozoic rocks of that part 
of Kincardineshire which lies south of the Highland fault. As has been shown in a 
preliminary note,* they include : 
(1) Upper Cambrian [?] (Highland border rocks). 
(2) Upper Silurian (Downtonian). 
(3) Lower and Upper Old Red Sandstone. 
Evidence of contemporaneous volcanic activity is found in all the formations except 
the Upper Old Red Sandstone; and certain intrusive rocks are probably of Carbon- 
iferous age. 
II. Upper Camprian [?]. 
A narrow strip of Highland Border rocks occurs on the coast near Stonehaven, 
extending from a point on the foreshore opposite St Mary’s Chapel, Cowie, to Garron 
Point. The predominating rock type is a crushed green igneous rock, which has 
undergone intense shearing and folding, and to a large extent has been converted 
into chlorite schist. Vesicular structure, however, can still be recognised in places, 
and “ pillowy” structures are sufliciently well preserved to demonstrate the original 
igneous character of the rocks. The field evidence suggests that they are pillowy 
lavas or spilites, and this is borne out by microscopical examination of the least altered 
parts of the rock. All the slides examined are typical spilites, and several show 
characteristic variolitic structures.t The coarsely crystalline diabase types, pre- 
sumably intrusive in character, described by Mr Barrow from the other lenticels, 
have not been found. 
The Highland Border rocks at Stonehaven may be looked upon as consisting 
mainly of a succession of pillowy lavas, but here, as in nearly all described occurrences, 
they are accompanied by fine-grained siliceous sediments. In the present case these 
consist of cherts, jaspers, and black cherty shales rich in iron oxides. These occur 
chiefly as intercalations between successive flows, but to some extent they are found 
in lenticular masses, suggestive of their having originally filled spaces between 
adjacent pillows. The sediments in every case consist of silica and iron oxides 
with varying proportions of calcite. In none of the slides has any undoubtedly 
terrigenous material been detected. Some of the cherts resemble the radiolarian 
* Geol. Mag., dec. 5, vol. viii. p. 63. 
t+ A detailed account of the petrography of these and other igneous rocks of South-Eastern Kincardineshire 
will be given in another paper. 
