Description:Gyrolithes is a vertically oriented burrow that shows a tightly spiraling form in vertical section; the breadth of the sprial is consistent throughout the length of the burrow. In some instances, Gyrolithes is a spiraling offshoot of Thalassinoides and can extend for several meters into a sedimentary sequence. Gyrolithes is interpreted as a dwelling structure that may have had some feeding combined; and arthropod tracemaker is probable.
