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The 14Chrono Centre
Manual for psimpoll and pscomb
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The user is prompted for values for an
estimated age and then estimated error for the top sample of the
sequence. A value for the age of the top sample may be given, but the
default (0±50) will cover most purposes, and a value of < -2000 (I
suggest using -9999) means that there is no age estimate available (or that
a radiocarbon age falls exactly at the top sample). This usage is different
from that for the basal age (Lc) for
historical reasons: it may change. The
allowed range is -10000 to 100,000, with an error between 0 and 2000. If no
value is given for the top sample, ages calculated for samples above the
uppermost age are obtained by extrapolation.
A value can still be entered here, and will be used, even if calibrated dates
are being used (menu Lj). It will always be treated
statistically as a normal distribution.
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Copyright © 1995-2007 K.D. Bennett
Archaeology and Palaeoecology | 42 Fitzwilliam St | Belfast BT9 6AX | Northern Ireland | tel +44 28 90 97 5136
Archaeology and Palaeoecology | The 14Chrono Centre | URL http://www.qub.ac.uk/arcpal/ |
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