Whilst looking for some more 24mm gauge trainsets, I came across this t-rex train
Now granted it is not actually running on track, but some mining tubs could be built using the wheels from other dinasaurs.
Narrow gauge Francophile interested in 1m, 60cm,50cm , 40cm and smaller gauges . Build in scales from 1/6th to 1/24th. Also 1/32nd and 1/35th using 16.5mm track to represent 50cm and 60cm gauges. http://www.rue-d-etropal.com