Lake Pavin History, geology, biogeochemistry, and sedimentology of a deep meromictic maar lake

115

10 cm

LEVEL

(m) NAME LITHOLOGY

THICKNESS

(m)

SEDIMENTARY

STRUCTURES PROPORTIONS (%)

BD.L.P V.L.P J.PMxMnls

0.055

0.05

0.05

0.075

0.22

0.03

0.10

0.01

0.60

0.15

0.105

0.05

0.17

0.06

0.01

0.06

0.20

0.030.03

0.12

0.02

0.05

12 40

Hu

P4

P3

BML

P1

P2

a

b

c

de

f

g

hi

a

b

c

a

b

a

d

c

b

c

d

e

f

g

hi

j 0.09

0.060.04

0.105

>0.10

>0.10

2.18

2.13

2.08

2.005

1.785

1.755

1.655

1.645

1.045

0.895

0.79

0.74

0.57

0.510.50

0.44

0.240.21

0.19

0.070.05

0.00

2.44

2.382.34

2.235

2.53

83055

84741819 050302 3028

8417 252 26

10 15 2138 25 0

7316 314 30 0

8317 215 27 1

5320 518 18 4

5314 713 30 1

3349000

3276500 5

1319104

0329005

5572355 5

4553335 0

8641535 5

4220 155 45

0314 123 50

0177116 5

0598123

(^010319151212306552)
0216 121 60
0148123 0
0229114
6316 719 20 2
Staon 1 Staon 2 Staon 3
Az 70 Az 120 Az 190
Key Thicknesses are given in meters.
Fine ash
Coarse ash
Coarse ash with lapilli
Lapilli with ash
Lapilli
Sedimentary structures
Bombsags
Planar bedding
Cross stratification
Dunes
Dunes with secondorder ripples
Normal graded bedding
Inverse graded bedding
Other
Basaltic Montchal Lapilli (BML) Erosional channel
Humus (Hu) with juvenile and lithic pyroclasts
Lithology
Lithic block/bomb
Pumice block/bomb
Mx : matrix Mnls : free minerals D.L.P. : dense lithic pyV. L.P. : vesiculated lithic pyroclasroclasts (basalts) ts (scoria) B : basemenJ.P. : juvenile pytroclasts (pumices)
Angular / rounded pumices(all stations)
Fig. 6.7 Lithostratigraphic column of the Pavin deposit
6 Characterization of Phreatomagmatic Deposits from the Eruption of the Pavin Maar (France)