Strata

Periods

Archaeological periods by region, from the Palaeolithic to the post-medieval, with the PeriodO definition each one cites.

A

C

E

G

H

I

J

K

L

M

N

O

P

Q

  • Qin— 221–206 BCE
  • Qing— 1644–1912 CE

R

S

T

  • Tang— 618–907 CE

U

Z

  • Zhou— 1050–256 BCE

Stratum is the inventory, provenance and certificate system for fossil, mineral and shell collections. Strata is its open reference: every fact cites its source, and the credits page lists each one with its licence.