View of FACIES AND ARCHITECTURE OF A SAND-RICH TURBIDITE SYSTEM IN AN EVOLVING COLLISIONAL-TRENCH BASIN: A CASE HISTORY FROM THE UPPER CRETACEOUS-PALAEOCENE GOTTERO SYSTEM (NW APENNINES)

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SEPTARIA 3

Sh St Vfs fs ms cs Vcs Cg

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LOG

“ROVI”

LOG

“A.C.L.I.”

LOG

“FAULT”

LOG

“LORSICA”

Bio - 5a Bio - 5b Bio - 3b Bio - 4 Bio - 3

TERRAROSSA

Sh St Vfs fs ms cs Vcs Cg Grooves: 115-295 Grooves: 110-290 Flutes: 90; 91 Ripples: 340 Grooves: 170-350 HEB-5 Grooves: 160-340 Grooves: 110-230 Grooves: 82-262; 70-250; 40-220 Grooves: 120-300 Ripple: 010 Ripple: 240 Ripple: 130-310 Grooves: 110-290 Flute: 275 Grooves: 105-285 Grooves: 110-290 Grooves: 120-300

RIVA TRIGOSO

MADONNINA

M. ZATTA

MONTEROSSO

Sh St Vfs fs ms cs Vcs Cg Ripples: 024 Grooves: 125-305 Grooves: 104-284 Grooves: 114-294 Grooves: 112-292 Grooves: 70-250 Ripples: 030 Ripples: 200 Ripples: 210; 200 Grooves: 120-300 Grooves: 130-310 Grooves: 120-300 Ripples: 040 Grooves: 150-330 Ripples: 010

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0 10 20 30 40 50 60 70 80 90 100 110 120 130 140 150 160 170 180 190 200 210 220 230 240 250 260 270 280 290 300 310 320 330 340 350 360 370 380 390 400 410 420 430 440 450 460 470 480 490 500 590 510 520 530 540 550 560 570 580 Sh St Vfs fs ms cs Vcs Cg 0 10 20 30 40 50 60 70 80 90 100 110 120 130 140 150 160 170 180 190 200 210 220 230 240 250 0 10 20 30 40 50 60 70 80 90 100 110 120 130 Septaria 0 10 20 30 40 50 60 70 80 90 100 110 120 130 140 150 160 170 180 190 200 210 220 230 240 250 260 270 280 290 300 310 320 330 340 350 360 370 380 390 400 410 420 430 440 450 460 470 480 490 500 590 510 520 530 540 550 560 570 580 600 610 620 630 640 650 660 670 680 690 700 710 720 730 0 10 20 30 40 50 60 70 80 90 100 110 120 130 140 150 160 170 180 190 200 210 220 230 240 250 260 270 280 290 300 310 320 330 340 350 360 370 380 390 400 410 420 430 440 450 460 470 480 490 500 590 510 520 530 540 550 560 570 580 600 610 620 630 640 650 740 660 670 680 690 700 710 720 730 0 10 20 30 40 50 60 70 80 90 100 110 120 130 140 150 160 170 180 190 200 210 220 230 240 250

GOTTERO 1

GOTTERO 2

GOTTERO 3

M. RAMACETO

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3

4

6

5

MONEGLIA

Intermediate

Zatta MTD

Armoured clasts

Limestone beds

TEXTURES

Sand-injections

Wavy lamination

GIAIETTE MTC

VALLAI MTD

FA-C

FA-F2

FA-E2

FA-B

FA-F1

FA-E2

FA-C

FA-D

FA-B

FA-C

FA-E2

FA-D

FA-E2

FA-E1

FA-D

FA-E1

FA-D

FA-E1

FA-D

FA-E1

FA-F3

FA-C

FA-E1

FA-D

FA-B

FA-D

FA-B

FA-D

FA-B

FA-C

FA-B

FA-A2

FA-F2

DEIVA MARINA

MONEGLIA

MONTEROSSO

1

6 N

10 km

2

3

4

5 M.ZATTA

TERRAROSSA

M.RAMACETO

FA-D

(FA-B) Mid fan lobes

(FA-A) Inner fan channels (1) - Sandy channel-lobe transition (2)

The panel shows a proximal to distal orientation until

the Gottero 2 unit. Because of basin segmentation,

the correlation between M. Zatta

section and the rest of the succession is not

possible above this level.

FACIES ASSOCIATIONS

DEIVA MARINA

2

Lateral distances not in scale (total length ~53 km)

LEGEND

GOTTERO 2-3

Muddy rafts (HEB-1)

Chaotic facies (HEB-2)

Mudstone clast-rich (HEB-3-4)

Limestone clasts

Large-size mudstone clasts

Small-size mudstone clasts

Sandstone clasts

Dewatering sheets

Dishes

Ripple cross-lamination

Horizontal parallel

lamination

Convoluted lamination

STRUCTURES

- vCs

- Cs

- Ms

- Fs

Argillaceous clast-poor (HEB-5-6)

- Cg

- Sh

(FA-C) Outer fan lobes

(FA-D) Weakly amalgamated sheets

(FA-E) Isolated sheets (1) - Mud-prone sheets (2)

(FA-F) Thin-bedded intervals - basin plain (1) - slope deposits (2) - supra-MTD deposits (3)