From dating to inner mongolia
Stephen Selby examined several bows in Urumqi that were of various designs and from several periods.One type of great significance to the history of archery was very similar to bows familiar in the West from Greek, Persian and Scythian The bow in question possessed a feature that is no longer common in modern composite bows.
However, ancient Chinese historians had recorded the variety of races on their northwestern border as far back as the Han Dynasty.
425–585 Ma, together with the ∼500 Ma age for the metamorphism event previously determined for Northeast China, indicates that their provenance is the metamorphic rocks of Pan-African age that have a tectonic affinity to NE China.
A few older zircons with U–Pb ages at 1689–1801 Ma, 1307–1414 Ma, 593–978 Ma are also present, revealing the Neoproterozoic history of NE China. 252 Ma, suggesting that the main deposition of the Linxi Formation was at late Permain. 250 Ma zircon grains of all four samples yield weighted mean U ages of 250 ± 3 Ma, 248 ± 3 Ma, 249 ± 3 Ma, and 250 ± 2 Ma, respectively.
It was thick and narrow in the cross-section of that part of the limb where it bends.
Unlike later bows, with their broad lenticular or rectangular bending sections, this bow had a triangular section with the apex on the belly side of the limb.