It began as asubgenre of Abstract Expressionism. It was once a pejorative term but is now considered historically accurate. It involves a turning away from hard geometric shapes and thinly applied paint toward curvilinear shapes and sensuously thick paint.
It’s called Lyrical Abstraction. It’s what I do. Here’s some work related to this genre from Clyfford Still, who was a friend and major influencer of Mark Rothko:
1952-A by Clyfford Still, SFMOMA collection
Photo above courtesy of my favorite museum in the world, the San Francisco Museum of Modern Art. You can see this painting there, on the second floor.
1950-A by Clyfford Still. (Photo credit: Cave to Canvas )
Exiled Stardust 
Reblogged this on Conceptual Art.
I didn’t even know you could DO that! *awestruck*