From New Scientist:
Palaeontologists who found the amber sliced it into three thin sections, revealing at least 26 silk strands, some interconnected. The web is not complete enough to be firmly identified as an orb web, with a spiral strand wound on radial spokes. But Grimaldi says the fragments are consistent with orb webs. "It's a geometrically complex web, certainly not a random assortment of strands like a cobweb. It was certainly in one plane," he told New Scientist.