
INDEX. 
earliest traces of, 763, 780, 781, 783%, 
811; toothed, 811, 840; reptilian rela- 
tions of the oldest, 812, 840; appearance 
of modern types of, 855 
Birdseye Limestone, 692 
Biscay, progress of dunes along Bay of, 
324 
Bison, 880; geological action of, 457 
Bitter lakes, 395, 400 
Bitter spar, 83 
Black, as a colour of rocks, 92 
Black-band ironstone, 175 
Blackdown Beds, 820 
Black River limestone, 692 
Black Sea, delta-growth in, 390 
Black soils of India and Russia, 458 
Blackthorn, fossil, 875 
Blastoids, 722 
Bleaching of rocks by eruptive masses, 
572 
Blood-rain, 325 
Blow-holes formed by the sea, 429 
Blown sand, 155 
Blowpipe analysis, use of in geological 
research, 194 
Bog-bean, fossil, 875 
Bog-iron ore, 174; agency of plants in 
formation of, 462 
_ Bog-myrtle, early forms of, 803 
Bognor Beds, 845 
Bogs, formation of, 458; bursting of, 460 
(see Peat) 
Bohemia, drainage of, 361; mineral mat- 
ter removed in solution from, 366; 
Silurian basin, 622; Silurian colonies, 
627; Eozoon, 639; Archean rocks, 645; 
Cambrian, 659; Silurian, 666, 689; 
Coal-fields, 748; Cretaceous rocks, 802, 
829; Tertiary volcanoes, 25 
Bolderian Beds, 859 
Bolonian group, 797 
Bombs, volcanic, 162, 206, 566 
Bone-beds, 169; of Ludlow Rock, 666, 
681; of Rhetic group, 767 
Bone-breccia, 169 
Bone-caves, 605 
Borelis, 852 
Bores of rivers, 419 
Borings, evidence from as to earth’s in- 
~~ ternal heat, 46 
Boring shells, 455 
Bornia, 735 
Boron, influence of in sublimation, 293; 
in the crystallization of granite, 302 
Bos, 875 
- Bosses, eruptive, 539, 545 
Bothriolepis, 706 
Bottom-ice (see Anchor-ice) 
Boulder-clay, 161, 411, 417, 888, 894; 
marine shells in, 894; inter-glacial beds 
in, 890; contortion of rocks under, 510, 
891 
Boulonnais, Devonian rocks of, 703 
Bourbon, Isle of, 242 
939 
Bourqueticrinus, 805 
Bovey Tracy, leaf-beds of, 857 
Bracheux, Sables de, 848 
ar maximum development of, 
Brachymetopus, 724 
Brachyphyllum, 772 
Bracklesham Beds, 846 
Bradford Clay, 792 
Brahmaputra, delta of, 390 
Bramatherium, 872 
Branchiosaurus, 754 
Brandschiefer, 172 
Breakers, 422, 428 
Breaks in succession of organic remains, 
621, 632 
Breccia, 157 
Brecciated Conglomerate, 157 
Brecciated structure, 87 
Brenta, alluvium of the, 382 
Breynia, 869 
Brick, formation of zeolites in, by mineral 
water, 300, 355 
Brick-clay, 160 
Brick-earth, 154; formation of, 340; of 
Paleolithic age, 904 
Bridger Group, 853 
Bridlington Crag, 895, 896 
Brienz, alluvium in Lake of, 385 
Brine-springs, 350 
Britain, fragments of ancient table-land in, 
40, 924; submarine plateau of, 450; 
fjords or sea-lochs, 283; dunes, 324; 
ratio between rainfall and river dis- 
charge, 361; velocity of rivers, 364; 
river terraces, 383; subaerial denudation 
of, 445; peat-mosses or bogs of, 460; 
landslips of, 357; marl-lakes of, 394; 
tidal currents of, 420; height of waves 
around, 422; force of breakers around, 
422, 428, 429; sea-cliffs of, 480, 432, 
433, 434 
Archean rocks of, 640; Cambrian, 
652; Silurian, 660; Devonian, 699; 
Old Red Sandstone, 711 ; Carboniferous, 
736 ; Permian, 754; Trias, 764; Jurassic, 
784; Cretaceous, 814; Hocene, 843; 
Oligocene, 856; Pliocene, 873; Post- 
Tertiary, 883; Glaciation of, 883, 894; 
Paleolithic and Neolithic deposits, 907. 
Granite bosses, 541, 542, 544, 557; 
dolerite bosses, 545; basalt dykes, 554 ; 
voleanic action in Archean time, 260, 
643 ; Silurian, 662 eé seq. ; Old Red Sand- 
stone, 260, 560, 713; Carboniferous, 738 ; 
Permian, 751; Tertiary, 258, 563 (see 
under Volcanic); great fault in, 526; 
upheaval of, 277, 279; raised beaches 
of, 278, 893; submerged forests, 281 ; ex- 
amples of metamorphism in (local), 
574, 577, 579; (regional), 583 
Brockram, 755 
Bronteus, 673, 696, 697* 
Brontotherium, 869 


