Sections studied → Particulars of the sections↓

Section CV-Calcutta

(Figure 3)

Section K1-Kolaghat

(Figure 4)

Section D1-DumDum

(Figure 5)

Section B1-Barrackpore

(Figure 6)

Local (L) Zone

L. Biozone

CV.BZ.V

L. Biozone

L. Biozone

D1.BZ.III

L. Biozone

B1.BZ.Ia

Bioassemblage

Potamogeton-Typha-

Poaceae-Fern-

Concentricystes

Rubinus (Type II-ribs smooth,

surface psilate)

Bellamya-Pila- Thiara-Lymnaea (Fresh water mollusc

Heritiera-Potamogeton- Typha-Poaceae-

Fern-Gloeotrichia-

Concentricystes rubinus (TypeII)

Bellamya-Pila- Thiara-Lymanea-

(Fresh Water Mollusc)

Heritiera- Potamogeton-

Typha-Gloeotrichia- Poaceae-

Fern-Concentricystes rubinus (Type Bellamya- Pila-Thiara-Lymnaea (Fresh Water Mollusc)

Depth from Surface (cm)

Depth from Present MSL (cm)

Surface to

550 - 600

+600 to 00.00

Surface to500

+500 to 00

Surface to 535

+600 to +65

Lithology

Peaty Clay, Grey Silty Clay, Peat I

Clay, Peat

Clay, Peaty Clay, Peat

¹⁴C Date

Recent to 3470 to ca 5000 yr BP

Recent to 3470 yr BP to Ca 5000

Recent to ca2000

to 3030 yr BP

Local (L) Zone

L. Biozone CV.BZ.IV

L. Biozone D1.BZ.II

L. Biozone B1.BZ.Ib

Bioassemblage

Heritiera-Bruguiera-

Pandanus-Cheno-

Amaranthus-Poaceae-

Typha-Fern-

Concentricystes rubinus

(Type-I) Ribs Rough, Foveolate, Ornamentation at Polar Regions

Heritiera-Sonneratia- Pandanus

Cheno-Amaranthus-

Heliotropium-Typha- Fern-Concentricystes rubinus (Type-I)

Heritiera-Poaceae-

Typha-Alternanthera-

Fern-Gavialis gangeticus

Chitra indica (Vertebrate Remains)

Depth from surface (cm)

600 - 800

500 - 650

535 - 650

Depth from Present Day MSL (Cm)

00 to −200

00 to −150

+55 to −50

Lithology

Soft Grey Clay

With Wood Logs

Soft Grey Clay

with Wood Logs

Peat

¹⁴C Date

ca 5000 - 6210 yr BP

ca 5000 to 6175 yr BP

3030 yr BP to ca 4000 yr BP

Lithology

¹⁴C Date

Local (L) Zone

Bioassemblage

Soft Grey Clay with Wood logs

6210 yr BP to ca 6400

L.Biozone CV.BZ.II

Avicennia-Sonneratia-

Rhizophora-Ceriops-

Bruguiera-Excoecaria

Heritiera-Fern-Ammonia

L.BiozoneK1.BZ.II

Avicennia-Sonneratia-

Rhizophora-Ceriops-

Bruguiera- Palaeocirrenalia

Fern-Ammonia-Neritina

violacea-Telescopium-

telescopium-Geloina-

Bankia-Martesia striata

(Brackish water mollusc)

Soft Grey Clay with

Wood logs

6175 -ca 6500 yr BP

Depth from Surface (cm)

1100 - 1210

400 - 550

Depth from Present Day MSL (cm)

−500 to −610

+100 to −50