Page 206 - Volcanic Textures A Guide To The Interpretation of Textures In Volcanic Rocks

Index

Text, figure, Table, plate porphyritic texture (see also apparent coherent texture)
a'a (see also lava) 27, 54, 69-70, 34, 19.7 22, 27, 168, 1.4, 45.5-6
accessory lithic pyroclast see lithic fragment pseudobreccia 43.1, 43.4, 45.6
accidental lithic clast see lithic fragment pyroclastic texture (see also apparent volcaniclastic texture)
22, 26, 166-169, 46.5
accretionary lapilli 15, 29-30, 96, 100, 118, 121, 3, 9, Table 2,
7.6-7, 22.6, 38.1, 39.6, 40.1 shards 26, 166, 15, 46.5
achnelith (see also bomb) 27-28 volcaniclastic texture 3, 7, 54, 57, 113, 166-169, 42.6-
agglomerate 120, Table 3 7, 44.2, 44.6, 46.5
agglutinate 28, 120 armoured lapilli 29-30, 118, 7.8
armoured mud ball 29 ash 28-29, 6, Table 3
agglutination of pyroclasrs (see also welding) 28, 103
ash cloud surge see pyroclastic surge deposit
alteration 165-169, 32, 42, 43, 44, 45, 46 ash fall deposit see pyroclastic fall deposit
definition 165
diagenetic 23-24, 121, 165 augen schist 169, 46.6
autobreccia 53-54, 68-69, 94, 166, 2, 33, 36, Table 3, 10.1-3,
fracture- or matrix-controlled 166, 42-43
10.5, 19.1, 43.3
hydrothermal 8, 23-24, 54, 165 autobrecciation 28, 53-54, 58, 65, 71, 94
mineral assemblage 8, 12, 165, Table 1, Table 2 autoclastic deposit (see also autobreccia, hyaloclastite, lava,
Mount Read Volcanics 165-169 peperite) 1, 8, 22, 18, 31, 33, 53-71, 94, 166-168, 1,
of glass 23-24, 28, 165-167, 168-169, 44, 45 33, Table 3
of lavas, intrusions and autoclastic deposits 57, 166168, autoclastic fragmentation (see also autobrecciation, quench
10.1, 10.3, 12, 13.2, 42, 43, 44 fragmentation) 27
of pumiceous deposits 22, 27, 29, 30, 168-169, 6.3-4, avalanche see debris-avalanche deposit axiolitic devitrification (see
26.7, 45, 46 also devitrification) 24, 28, 14, 23.3-4, 25.4
phase 166 basaltic glass 23, 59, 2.2, 2.5
stage 166 basalt (see also lava)
texture 3, 165-166, 42, 43, 44, 45, 46 continental flood basalt province 70
two phase 166-169, 43.4-5, 45.6-7, 46.1, 46.6 hyaloclastite 60-61, 12.8, 42.8
amygdale (see also vesicle) 22, Table 1, 2.3-4, 12.8, 17.4 pillow lava 58-61 9.4, 14.5-6, 15.2-7, 16.1, 17.2-4
angular fragment breccia see hyaloclastite andesite (see also lava) subaerial 23, 69-70, 17, 34, 35, 9.5, 19.3, 19.6-7
hyaloclastite 11.4, 11.8, 12.1-5, 13.2-7, 43.2 subaqueous 23, 60-61, 25, 35, 2.2, 9.4, 15.2-7, 16.1,
pillowed 60, 23, 24, 25, 15.1, 16.2, 17.6 17.2-4
basaltic glass (see also sideromelane) 23, 59, 2.2, 2.5
subaerial 71, 36", 10.5-6, 19.5
base surge see pyroclastic surge deposit
subaqueous 71, 19, 25, 9.2-3, 11.4, 15.1, 16.2, 17.6
bedding-parallel foliation 27, 30, 103, 169, 33.4, 45.2^, 45.7,
angular fragment breccia see hyaloclastite 46.1-2
aphanitic texture 3, 31, 53, 61, 2, Table 1
bedload (see also traction transport and deposits) 111, 112, 117,
aphyric texture 3, 53, Table 1 120, 37.2
apparent texture bed thickness Table 2
bedding 31, 167, 168,8.4 block 27-28, 95, 118, 120, 6, Table 3, 6.8, 38.8
coherent texture 3, 7, 168, 1.4, 45.5 block and ash flow see pyroclastic flow deposit
matrix-supported 42.4, 43.1

polymict 113, 167, 10.3, 44.1

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