Towards the end of 2015, James Benning made one of his occasional expeditions to Utah, to the place where Robert Smithson's colossal land-sculpture Spiral Jetty (1970) extends out into the Great Salt Lake. The water-level was low, leaving the vast bulk of the Jetty exposed in the crisp air. His film measuring change captures two thirty-minute periods of that particular day, in the unblinking, unmoving takes that have become his trademark––beginning at 8:57am and 3:12pm respectively. A belated digital companion piece to his 16mm masterpiece casting a glance (2007), this new film hypnotically contemplates Smithson's art-work in relation to its wider environment and to the humans who walk on and around its gargantuan coils.

The titular troublemakers are the New York–based Land (aka Earth) artists of the 1960s and 70s, who walked away from the reproducible and the commodifiable, migrated to the American Southwest, worked with earth and light and seemingly limitless space, and rethought the question of scale and the relationships between artist, landscape, and viewer. Director James Crump has meticulously constructed Troublemakers from interviews (with Germano Celant, Virginia Dwan, and others), photos and footage of Walter De Maria, Michael Heizer, Robert Smithson, Nancy Holt, and Charles Ross among others at work on their astonishing creations.

Casting a Glance is a tribute to the American artist Robert Smithson. Between May 15 2005 and January 14 2007, I made 16 trips to the Spiral Jetty. Created in 1970, the Jetty is a 1,500-foot long spiral-shaped jetty extending into the Great Salt Lake in Utah constructed from rocks, earth, salt and red algae.

Standing apart along the northeast shore of the Great Salt Lake is a huge earthworks project, boulders and potholes, clinging brine and mirrored sky, which the film documents, as it moves back geologically to dinosaur history.