Roma Street Parklands are on the edge of the Brisbane CBD and are a beautiful location to enjoy a picnic, walk, smell the flowers, allow the geo kids to play on the playground or search for the numerous lizards that love this area.
Roma Street Parkland is the world's largest subtropical garden in a city centre. The parkland features a variety of themed gardens and recreational areas, with a web of pathways and boardwalks traversing cascading waterways and rocky outcrops.
Roma Street Parkland covers 16 hectares in the centre of Brisbane, Australia. The Roma Street Parkland is adjacent to Brisbane Transit Centre and the Roma Street Station. There is pedestrian access to the Roma Street Parkland from the Roma Street Station, as well as from Albert Street, and from the section of the Parkland which used to be called Albert Park, in Wickham Terrace.
Local Indigenous people used the area for thousands of years conducting meetings and ceremonies. In 1825 the Roma Street Parkland area was part of the original Brisbane settlement. In 1875 a terminal station in Roma Street was constructed as part of the main western railway to Brisbane linking Ipswich and Toowoomba. The terminal grew to become a major goods yard for Brisbane and, between 1911 and 1934, the area was extensively redeveloped to support its increase in services.
In 1920 extensive excavation, removing 554,300 cubic meters of earth, permanently altered the steep terrain creating the current day artificial escarpment and the boundary of the former Albert Park. Construction began of the current Parkland in 2000 and the parkland opened to the public in 2001.
Excavations in the Brisbane CBD have uncovered significant geological zones that underlie the city. Argillite, Greywacke and Phyllite are some of the rock uncovered during excavations.
Phyllite is a type of foliated metamorphic rock created from slate that is further metamorphosed so that very fine grained white mica achieves a preferred orientation. It is primarily composed of quartz, sericite mica, and chlorite. Phyllite has fine-grained mica flakes in a preferred orientation, whereas slate has extremely fine clay flakes that achieve a preferred orientation, and schist has large flakes in a preferred orientation. Among foliated metamorphic rocks, it represents a gradation in the degree of metamorphism between slate and schist. The minute crystals of graphite, sericite, or chlorite, or the translucent fine-grained white mica, impart a silky, sometimes golden sheen to the surfaces of cleavage, called 'phyllitic luster'.
Phyllite
Questions
Q1 Describe the colours you see along the rock wall?
Q2 Describe the texture of the rock wall.
Q3 Describe the layers of the rocks that you see here.
Q4 How many cubic meters of earth were removed from here?
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References ~ Wikipedia