Dating time frames

Geologic Time Scale: Its History and Development Scottish geologist James Hutton (1726-1797) set the stage for the development of the geologic time scale in the late 18th century with the publication of his Theory of the Earth (1785).

In it, Hutton advanced "uniformitarianism," a geological doctrine which basically assumes that current geologic processes, occurring at the same rates observed today, in the same manner, account for all of Earth's geological features, a principle later championed by British geologist Sir Charles Lyell (1797-1875).

Identifying and dating antique frames is an art form in itself.

Check on the back of the antique frame for a maker's mark and date. The company may still be in existence or you may find the time period they were in operation in old city directories.

Picture frames entered the realm of fine art collectibles in the 1990s.

"The antique frame has become so valuable that it can be separated from the painting it surrounds, or even the mirror, and it can be appreciated for its own independent aesthetic," said New York frame dealer Eli Wilner in the introduction to Antique American Frames Identification and Price Guide.

The geologist has never bothered to think of a good reply, feeling that explanations are not worth the trouble as long as the work brings results.

The geologic time scale was developed shortly thereafter. What is the geologic time scale and how does it work?The layers are catalogued and arbitrarily arranged into a specific order (not necessarily the order in which they are found).This order reflects the assumption of macro-evolution (the widely held notion that all life is related and has descended from a common ancestor). A variety of fossils from each layer of strata have been chosen to be what are called "index fossils".For instance, if the frame is made of wide, flat plank boards of fine-grained warm yellow oak, it fits into the period of the Arts & Crafts movement in America.Estimate the period look of your frame to establish a general date.

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