Quarrying at Slacks Creek State Quarry, in what is now Neville Lawrie Reserve adjoining Daisy Hill Conservation Park, began in the 1950s.The site was used for extracting a range of road making materials, sand, gravels and clay.
The area is popular today amongst walkers, joggers and mountain bike riders as well as horse riders. Dogs are allowed in the park but must remain on a leash.
This area formed in the Upper Triassic period and forms part of the Moorooka Formation. The formation consists of conglomerate followed by shales and then sandstones.
The best exposure is in the Slacks Creek State Quarry where 40 feet of shales and partly carbonaceous shales overlie the conglomerate. In other areas lacking shale outcrops, the vertical distance between the top of the conglomerate and the lowest sandstone bed is 15-25 feet. The shales are succeeded by medium- to very coarse-grained protoquartzites and some subgreywackes, with minor granule and pebble conglomerates. A few finer, thin-bedded, more micaceous sandstones (lithic greywackes) are interbedded with the coarser, more mature members. The sandstones may be vertically continuous but outcrop in a maximum of six layers forming small cliffs and escarpments.
- The Geology of the Slacks Creek Area, Southeast Queensland, Gould, 1967
At GZ is a seat that you can sit on and take in the tranquility and beauty of the area while you consider the following questions. Answers should be sent by private message. Please do not include your answers in your log.
- Please approximate the length and breadth of the quarry
- Describe the rock at your feet. What type of rock do you think this is?
- (Optional) Please include a photo of yourself or your GPSr at GZ.
Please feel free to log your find without waiting for an answer. I will contact you if there are any problems with your answers.
References:
The Geology of the Slacks Creek Area, Southeast Queensland by Rodney E Gould, 14 July 1967, retrieved from UQ eSpace on 5 November 2017.
Mount Cotton Quarry Extension Project, retrieved from http://mtcottonquarry.com.au/latest-claims-cause-confusion/ on 5 November 2017.