Plan 9 from Bell Labs’s /usr/web/sources/contrib/pac/dat/strat/scripts/duration
#!/bin/rc ### # print out duration of stratigraphic unit in Ma ### NAME =$1 awk -F* '$1 ~ /'$NAME'/ {base= $2; top=$3; x=base-top; print $1":", x, "Ma" }' unt.g
