F, 23 
. 24 
. 25 
oie] 
F. 15 
F. 24 
F, 22 
| 
a 92 G wm 
REPORT—1899, 
Unconformity. 
Upper Old Red Sandstone on Siccar Point, Berwick. . 40 8. 
Silurian Rocks. 
Surface Agencies; Denudation and Deposit. 
Action of Rain. 
Rain-water cutting Old Moraine Harper River, Canterbury, New Zealand. 
Material into Earth-pyramids. 53, 54 P. 
bE ” ” ” ” ” 
” ”? 9 ” be) ” 
Glaciation; Glaciers, 
Medial and Lateral Moraines . Theodule Glacier, Zermatt, Switzerland. 
40 P. 
Medial Moraines : 5 . Breithorn and Gorner Glacier, from Gorner 
Grat, Switzerland. 40 P. 
Glaciation ; Glaciated Surfaces. 
Ice Stria, Giant’s Kettles, and Glacier Garden, Lucerne, Switzerland. 
Boulders. 40 P. 
Glaciated Slate, Surface of Hill- Craiglea, Perth. 15 P. 
top, 1,500-1,600 feet. 
Action of Waves. 
Ripple-marked Devonian Rock. Brohl Valley, Hifel, Germany. 40 P. 
40 P. 
” ” ” ~ ” ” ” 
Volcanic and Plutonic Rocks. 
Volcanoes. 
Cones of Tuff and Trachyte . View south from Puy de Nugére, Auvergne. 
40 P.S. 
Tuff Cones . é : ; . View north from Puy de Nugére, Auvergne. 
40 P. 8. 
of oath is ‘ : ; . View south from the Puy de Dome, Au- 
vergne. 40 P. 
Tuff Cone broken by Outburst Puy de la Vache and Puy de Déme, Au- 
of Lava. vergne. 40 P. 
Rock-masses and their Relations. 
Dip of Volcanic Ashes i . Gravenoire, Puy de Déme, Auvergne. 40 P. 
Conical weathering of Tuff . Le Puy, Auvergne. 40 P. 
Weathering of Columnar Pho- Roche Sanadoire, Mt. Dore, Auvergne. 
nolite. : 40 P. 
Alternation of Lava and Tuff . ‘Cascade Section,’ Mt. Dore, Auvergne. 
40 P. 
Trachyte dykes in Tuff as . Gorge de VEnfer, Mt. Dore, Auvergne. 
40 P. 
Fragments of Sedimentary rock Millhaugh, R. Almond, Perth. 15 P. 
includedin Acid Igneous rock. 
Rocks and their Structures, 
Curved Columns of Basalt Dachsberg, Siebengebirge. 40 P. 
Columnar Basalt. . : . Asbach, Siebengebirge. 40 P. 
Weathering of Columnar Basalt 4 6 40 P. 
