Fig 6 N&B Geometry Stair Comb Syst.ai

basement fracture. = magma conduit tube and pillow tongue. Steps. Stair volcanic system. 1. 2. 3. 4. 5. 6. 7. 8. 9. A basement. < 200 m. 2 pseudo-symmetric teeth.
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Fig. 6 A

Stair volcanic system Steps

2

1

4

3

7

6

5

9

8

< 600 m < 200 m

basement basement fracture = magma conduit

tube and pillow tongue

B

Comb volcanic system 2 pseudo-symmetric teeth

Teeth

65

43

7

7

21 d

76

5

43

c 21

B

1

1

A

100 m

43

21 e

b

6

3 54

B

100 m

21 a conic volcano

branch =main magma conduit

A

isochrone volcano line (1 to 7) track of the profile for the cross section AB

DURING eruption denuded mantle BEFORE any eruption

Chalot-Prat, GSA