Study
points to 500 BC Kerala maritime activity
C.
Gouridasan Nair
Radiocarbon
dating from Pattanam aids understanding of Iron Age chronology
THIRUVANANTHAPURAM: Kerala, or what later came to comprise it,
may have had maritime contacts with far off lands as far back
in time as 500 BC or even earlier, archaeological studies now
suggest.
The
Kerala Council for Historical Research (KCHR), which last year
conducted archaeological explorations at Pattanam, 7 kilometres
south of Kodungallur in Ernakulam district, says scientific analyses
of material collected from the area have shown the maritime activity
there to be as old as 500 BC "The artefacts recovered from
the excavation site suggest that Pattanam, with a hinterland port
and a multicultural settlement, may have had links with the Mediterranean,
the Red Sea, the Arabian Sea and the South China Sea rims since
the Early Historic Period of South India," said P. J. Cherian,
Director, KCHR.
The
KCHR undertook the excavations in February-April 2007 and sent
five samples to the Institute of Physics (IoP), Bhubaneswar. These
were charcoal samples from the Iron Age layer and parts of a wooden
canoe and bollards (stakes used to secure canoes and boats) recovered
from a waterlogged context at the site. As determined through
analysis using Accelerator Mass Spectrometry (AMS) radiocarbon
(14 C), their mean calendar dates fall around 500 BC, with a span
of uncertainty of less than a century, Dr. Cherian said.
According
to him, it is for the first time that 14C AMS analysis was done
for an archaeological site in Kerala. This dating, he said, was
crucial to understanding the cultural sequence of the site which
was active since the Iron Age.
The
project was undertaken by the KCHR as part of the Muziris Heritage
Project of the Kerala Government with technical assistance from
a dozen national-level scientific institutes and laboratories.
The organic samples have been sent to the National Geophysical
Research Institute (NGRI), Hyderabad, for analysis employing conventional
or radiometric method of 14C dating, he said.
T.
Satyamurthy, former Superintending Archaeologist, Archaeological
Survey of India (ASI), told The Hindu over the phone from Chennai
that the Pattanam findings were quite encouraging.
He,
however, called for more horizontal excavations with the involvement
of experts to further validate the initial findings.
More
samples establishing the antiquity of the site and activities
there are called for to come to firm conclusions about the findings.
This would call for excavations on a larger scale, he said.
Dr.
Cherian said Pattanam is the first habitation site of the Iron
Age unearthed in Kerala. Since previous enquiries were confined
to megalithic burials, no firm dates were available for the Iron
Age, except in a few instances such as Mangadu (circa 1000 BC)
and Kunnoni. The radiocarbon dating from Pattanam will aid in
understanding the Iron Age chronology of Kerala. The 14C ages
of the charcoal samples from the lower-most sand deposits in the
trenches at Pattanam suggest that their calibrated date range
(14C ages adjusted for past fluctuations of 14C in the environment)
is from 1300 BC to 200 BC and 2500 BC to 100 AD, respectively.
The range, Dr. Cherian said, has been kept wide enough so that
the probability of accuracy will be 95 per cent. This suggests
that Pattanam witnessed the Iron Age occupation during the first
half of the first millennium BC. Indigenous people seem to have
settled in the area during the Iron Age when it was covered by
beach sand. The occupation must have
Canoe,
bollard samples
The other samples analysed by the IoP were parts of a canoe and
bollards belonging to a fascinating hinterland port with wharf-like
features. The wood was identified as Artocarpus hirsutus Lamk.
(wild jack or 'anjily') and Tectona grandis (teak) by the Kerala
Forest Research Institute, Thrissur. The 14C date range of the
canoe sample is 1300 BC to 100 BC, (that is, 700 plus or minus
600 BC with 95 per cent probability). For the two bollard samples,
the 14C date range is 800 BC to 200 BC (500 plus or minus 300
BC, with 95 per cent probability) and 1100 BC to 1300 AD, ( A.D.
100 plus or minus 1200 with 95 per cent probability), respectively.
Dr.
Cherian said the 14C AMS dates suggest that the Pattanam canoe
can be the earliest known canoe in India. The other evidence of
an early boat discovered from the waterlogged deposit at Thaikkal
near Cherthala in Alappuzha district two years ago was dated to
AD 13th-14th centuries. The error weighted mean for all five samples
analysed is 500 plus or minus 80 BC. Corroborative analysis in
relation to the other artefacts recovered is necessary for a clearer
picture of the chronology of the site.
The
team
The AMS analysis was undertaken by scientists of the AMS Radiocarbon
Laboratory of the IoP, led by Dr. G.V. Ravi Prasad and Dr. Koushik
Dutta. The KCHR team was led by, apart from Dr. Cherian, V. Selvakumar
(Tamil University, Thanjavur) and K.P. Shajan.
The
ASI has granted a licence to the KCHR for a second excavation
and the work is set to begin in February. Besides the excavation
at Pattanam, the licence will enable the KCHR to explore within
50 km of Kodungallur. Underwater exploration in waterbodies in
a 20-km radius is also included.
The
project, to be undertaken in collaboration with the Southern Naval
Command of the Indian Navy and the State Archaeology Department,
will have Professor K. Rajan (Pondicherry University), Dr. Selvakumar
and Dr. Shajan as co-directors.