This was a period of elevated temperatures worldwide and of reduced precipitation over at least part of the plains.
At the Muscotah marsh in northeastern Kansas, there is no tree pollen present at the peak of the Altithermal.
1" square turquoise colored bead discovered in Gilchrist County, Florida.
Only have one example......................................., French & Indian War period hoe, 5" blade, 1.25" socket, found within three miles of the fort, early crude blacksmith marks, good form and firm metal...................................................., This style as used from 1740 - 1830, 9" X 8"X 6" overall.
His worrying about where a pot came from and what period it dated to and what that meant to the other objects buried with it were light-years away from the ideas represented in this photo dated to 1800, in which "Egyptian pots" was considered enough information for the thinking man.
Very fine condition......................................., 48" X 75", split seamed in two panels sewn together, edge trimmed in red, two ornate red and blue stars to either side "P. The wool fabric shows two very small areas of holes along with scattered stains from obvious use.
The period comes to a close with the gradual onset of a period of warmer and drier climate called the Altithermal.
This time period coincides roughly with the climatic episode known as the Altithermal.
The seriation method works because object styles change over time; they always have and always will.
A good example of a change in artifact type is the development of hand-held PDAs from those first enormous cell phones. As an example of how change through time works, consider the different music recording methods that were used in the 20th century.
Wooden frame held together with wooden pegs, spindle decorative trim at all four sides, pierced tin center with swinging door exposing the removable tinned charcoal pan, iron wire handle intact.
See example #1444 in Neumann's book "Early American Country Furnishings" page 326.
Seriation, also called artifact sequencing, is an early scientific method of relative dating, invented (most likely) by the Egyptologist Sir William Flinders Petrie in the late 19th century.
Petrie's problem was that he had discovered several predynastic cemeteries along the Nile River in Egypt that seemed to be from the same period, but he needed a way to put them in chronological order.
He assumed that the change in styles was an evolutionary one, and, if you could quantify that change, he surmised it might be used to indicate which cemeteries were older than others.
Petrie's notions about Egyptology, and archaeology in general, were revolutionary.