The 17th and early 20th centuries roughly mark the beginning and the end of modern philosophy.

The pectinate line only roughly marks this transition.

In most fish, the rear edge of the operculum roughly marks the division between the head and the body.

A modest stone monument roughly marks the liftoff spot.

These results roughly mark the elementary, secondary, and college levels.

I tilt my head to one side but all I can see are the numbers roughly marked.

It roughly marks the northern boundary between the modern district of the Angel and Islington proper.

The bridge across the river roughly marks its northern boundary.

It roughly marks the southern edge of the farmable land around Livingston.

However, 1979 roughly marked a turning point, and stocks went on to enjoy a bull market for the better part of two decades.