The phrase "abstract period" is correct and usable in written English.
It can be used in contexts discussing time frames that are not concrete or specific, often in philosophical or theoretical discussions.
Example: "In the abstract period of human history, many cultures developed their own unique philosophies and art forms."
Alternatives: "conceptual timeframe" or "theoretical duration".
Fairweather is one of Queensland's most distinguished artists – this painting comes from his short-lived completely abstract period that only lasted a few years.
My abstract period, as I like to remember it, was an oil-over-latex, enamel-on-glass, dripping binge of experimentalism that paved the way for latter-day masterpieces.
Images of Russia, usually of an old Russia, surface constantly in his earlier work - troikas, brightly coloured onion domes and the rest - and even in the great paintings of his abstract period we can detect the fertilising influence of Russian icons with their own strangely abstract language of piercing colours and symbolic shapes.
My Abstract Period, when I took out my contact lenses to "see better".
The Musee Zadkine houses a research library and displays over 100 works from Zadkine's primitive, cubist, classic and abstract periods.
"I was kind of discouraged about art because, at that point in time, art was very much abstract expressionism, period," Larsen explained to The Huffington Post.
But Glimcher says that Katzs work grew directly out of the abstract expressionist period, using the same simple, gestural painting style.
Drowning Girl depicted the advancement of Lichtenstein's cartoon work, which represented his 1961 departure from his abstract expressionism period, from animated cartoons to more serious themes such as romance and wartime armed forces.
An artistic polymath, Wilson's brand of surrealism involves abstract furniture, periods of experimenting with specific colors (and their absence), and particular scenarios pulled from paintings and dreams.
His paintings soon began shifting toward representation; he took to calling his abstract paintings "a period style".
The results were abstract heads with period hairdos all shaped out of black leather — chic if somewhat unsettling, an S-and-M trip to "Downton Abbey".
