Stairs Down

Concrete stairs cut straight down into the floor of Hornsby Quarry, their base lost under pooled water that reflects light back up the shaft. The walls closing in on either side are dolerite, the same dense volcanic rock that made this site worth industrialising in the first place. There are no handrails. No signage. Just the descent, and the water waiting at the bottom. Hornsby Quarry sits within a Jurassic diatreme in Old Mans Valley, off Quarry Road, Hornsby. The diatreme is the largest volcanic neck in the Sydney area, its geology between 146 and 200 million years old, extruded up through the sandstone of the Sydney Basin and left exposed by a century of extraction. Quarrying began on the site around 1905, when the Higgins family, who had farmed the fertile volcanic soil of Old Mans Valley since the 1830s, began cutting dolerite from the ground for use as gravel aggregate. Hornsby Shire Council purchased the quarry in 1912, recognising the importance of local dolerite for building and maintaining roads across northern Sydney. Ownership and operation passed through several hands across the twentieth century: Hornsby Blue Metal Limited from 1924, then Farley and Lewers from 1959, then CSR Construction Materials from 1981. By 1993, an estimated 2.8 million tonnes of reserves remained. Quarrying ceased in 2002. The photograph was made in 2015, thirteen years after the last extraction. The void by then reached approximately 120 metres at its deepest point. Water had settled into the lowest reaches, still and reflective, turning the base of these working stairs into something closer to a dock than an access point. The stairs themselves are straightforward industrial construction, built for function and nothing else. What the photograph records is exactly that: a way down into the earth, still intact, with nowhere useful left to go.