ON THE OLDER KOCICS OF ANGLESEY. 417 



103. Chlorach Bach, Llanerchymedd — Fine-grained rock with infusion of 



calcite. 



104. Trewyn, Bodafon — Fine-grained rock with abundant quincnncial mica. 



105. Under southern hill, Bodafon — Showing elemental orientation. 



106. By Bodafon Farm — Fine-grained micaceous rock with fragments. 



107. Carnedd a Tre'r beidr, Bodafon — Fine-grained, with fragments elementally 



orientated. 



108. Clegyr, Bodafon- Fine-grained rock. 



109. Bodafon Hill — Quartzite of coarse groundmass elementally orientated. 



110. West side of Bodafon — Fine felted mica. 



111. Craig Fryr — Quartzite of coarse groundmass elementally orientated. 



112. Llanfaelog — Chloritised granite. 



113. Intrusion, west of Porth-y-ly-wod — Cataclastic granite or mortar structure. 

 111. Border of granite, near Pen-y-carnisiog — Glomeroporphyritic microgranitic 



felsite. 



115. Gwalchmai — Cataclastic granite or mortar structure. 



116. Near Craig-yr-allor — Chloritised granite. 



117. Henblas, Llandiygarn — Clean granite. 



118. Ynys Dodyn, south of Rhos Goch — Cataclastic granite, microspectral and 



with microcline in cracks onl}'. 



119. T3'n-y-Pwll, south of Llanerchymedd — Glomeroporphyritic microgranitic 



felsite. 



120. Bryn-Twrog, south of LlanerchjTiiedd — Cataclastic granite. 



121. Yrynys Coed, Coedana— Cataclastic granite or mortar-structure. 



122. Junction at Maengwyn, Coedana— Coarse granite with tourmaline, in dusty 



schist, with mica in cracks. 



123. Tafarn-y-botel, Llanerchymedd — Gneissose granite, or granitoid gneiss. 



124. Just north of Lleche3'n-farwy — Plagioclastic rock. 



12.5. First green band, west of Llangwfen — Mylonitic diabase. 



126. Dinas Llwyd — Coarse fragmental rock. 



127. South of Bodowen — t^livine diabase. 



128. Craig-yr-allor — Foliated liornblende, plagioclase, and ilmenite. 



129. Craig-yr-allor— Cataclastic (epi ?) diorite. 



130. Craig-5'x-allor — (Epi ?) diorite, formerly a dolerite. 



131. Near .Craig-yr-Allor — Foliated (epi ?) diorite with abundant sphene. 



132. Northern boss, Craig-yr-allor — Cataclastic diorite, now chlorite and calcite. 



133. North of Llandrygarn- -Coarse mica diorite with sphene. 



134. West of Penterfyn, Rhos Goch — Coarse mica diorite with apatite and 



sphene. 

 135 Yj'ynys Coed, Coedana — Cataclastic gneiss with chlorite. 



136. South-west of Plas LLintihangel— (Epi ?) diorite. 



137. East of Plas Llanfihangel — Complex of minerals, including pyroxene and 



rutile. 



138. Gwalchmai — Spicular plagioclase in magnetite 



139. South of Traeth Dulas — Somewhat cataclastic white granite. 



140. South of Traeth Dulas — Quartz-felspar mosaic. 



141. South of Traeth Dulas — Gneiss with confused orientation. 



142. South of Traeth Dulas— Fine mica schist, quincuncial orientation. 



143. Newborough Warren, Bryn Gorsddu — Fragments with mica infilling. 



144. South of Hafodtj' — Fine mica schist with elemental orientation. 



145. Hafodty, south of Llangaffo — Laminated rock, epidote, surrounded by 



chlorite. 



146. Bodowyr, ralley of River Braint — Fine mica schist with elemental orienta- 



tion, vermiculite. 



147. South of Bodlew, River Braint (E.)— Fine felted mica (tig. 11). 



148. South of Bodlew, River Braint (W.) — Mosaic rock with microspectral crape 



structure (tig. 15). 



149. Ty JIawr, south of Llandaniel — Crape structure in quartz vein only. 

 1.50. Llangaffo Cutting — Coarse mica schist, straight linear mica (fig. 6). 



151. Main line, south of Holland Arms — Cataclastic coarse mica-schist, speckled 



felspar (fig. 1). 



152. Quartzose lump, Berw Ycha — Coarse mica schist with linear orientation, and 



fragments. 



153. Farm, south of Holland Arms— Coarse mica schist. 



1 888. E E 



