The earliest of these are in Haida Gwaii, where bear hunting is dated to at least 12,650 cal BP, during the heart of the Younger Dryas interval.
Other sites in southeast Alaska and in the Fraser River lowlands date to around 12,100 cal BP. 13,000 cal BP Clovis surface collections, and the emerging data from the pre-Clovis Ayer Pond bison butchery site, suggest pre-Younger Dryas occupation.
Cheaper products were also produced, but it is likely that they deteriorated quickly with use.
The Younger Dryas may therefore be seen as something of a worst-case scenario for both the human occupation and the archaeological investigation of the Northwest Coast.
Playing cards are flat, rectangular pieces of layered pasteboard typically used for playing a variety of games of skill or chance.
In the future, more computerized methods will likely be adopted promising to generate a substantial increase in the playing card manufacturing industry.
The exact story of the emergence of playing cards is debated.
Despite patchy and dynamic marine and terrestrial environments, these results suggest a challenging, yet viable environment for humans.
Archaeological evidence for Younger Dryas human occupation is currently limited to six sites, of which four are associated with karst caves.The next significant advance in card manufacture was the replacement of wood blocking and hand coloring with copper plate engraving during the sixteenth century.When color lithography was developed in the early 1800s, the production of playing cards was revolutionized.When Europeans began to produce their own cards, they did not produce consistent designs and any number of suits or face cards would be made.In the latter part of the fifteenth cenwry, standardized versions of cards began to appear.The earliest decks of playing cards were hand-colored with stencils.