438 
THE CARBONIFEROUS VOLCANOES 
BOOK VI 
tuff is veiy gieat. Lesides thicker well-marked bauds, successive in- 
numerable thill layers occur there among the associated zones of sedi- 
mentary strata which separate the sheets of liasalt. The character of these 
tuff-seams may be inferred from the following details of less than two feet 
ol rock at I’ettycur Point ; — 
Tuff ..... 
Liine.stone 
Tuff . . . ! ’ 
Slialo .... 
Tuff • . . ! ! 
Shale and tuff .... 
Sliale ..... 
Limestone .... 
Shale full of volcanic dust 
Shaly limestone ... 
liaminated tufaceoms limestone 
Limestone in thin bands, with thin laminie of tuft 
Granular tuff ... 
Argillaceous limestone, with diffused tuff . 
Fine granular tuff 
Argillaceous limestone, with diffused tuff . 
Laminated limestone 
Limestone, with parting of granular tuff in middle 
Tufaceous shale .... 
Limestone .... 
Shaly tuff .... 
Laminated limestone 
Tuff ... 
1'5 
0-2 
O'o 
0-2 
OT 
1-0 
0'2 
0 - 5 
3 5 
1 - 5 
2 - 0 
0-8 
0-6 
0-9 
0 - 7 
1 - 5 
OT 
0-9 
2 - 0 
0 - 4 
1 - 25 
OT 
1-2 
inch. 
J) 
5) 
>! 
5) 
5J 
yy 
yy 
y'y 
yy 
yy 
yy 
yy 
yy 
yy 
yy 
yy 
yy 
yy 
yy 
21 ’6.5 inches. 
Sttch- a section as this brings vividly before the mind a long-continued 
inter inittent feeble volcanic action during pauses between successive out- 
Irursts of lava.. In such intervals of 
(piiescence, the ordinary sediment of the 
lagoons accumulated, and was mixed up 
with the debris supplied by occasional 
showers of volcanic dust. In this Fife 
volcanic series, thin layers of sandstone, 
streaked with remains of the Carbon- 
iferous vegetation ; beds of sliale full of 
cyprld-cases, ganoid scales, and fragmen- 
thin l.eds of limestone, and 
flro-clay, one foot, wtli it« loM’pr lavfirs pressed bflllds of firo-rbiv Knm-rnvf o^in-ivio rxf 
<lo\vn by the stone whilo Uie uptW layers ris^ Ocuiuo Ui JJU. Lid} bU23poitlllg SeaillS 01 
over it, showlii" that the stone fell at the time COal aro inforlonvpd with t-nfl* 
wheifhairthlRseaiiMvas deposited. Tho firo-Hay ’ HlLLliL.dVttl WHO Strata 01 tUU 
s''.";: w'^boia ilirmS’lwck of basalt. Xow and then 
^ ^^scliarge of larger stones is 
seen to have taken place, as in the case 
of the block many years ago described by me as having fallen and crnslied 
down a still soft bed of coal (Fig. 151).^ 
^ Ceol. May. vol. i. p. 22. This Fife coast-section is given in full at p. 470. 
151. — Ejected volcanic block in C'arboii- 
iferous strata, BiiiTitislaud. 
