Eucalyptus marginata, commonly known as jarrah, djarraly in Noongar language and historically as Swan River mahogany, is a plant in the myrtle family, Myrtaceae and is endemic to the south-west of Western Australia. It is a tree with rough, fibrous bark, leaves with a distinct midvein, white flowers and relatively large, more or less spherical fruit. Its hard, dense timber is insect resistant although the tree is susceptible to dieback. The timber has been utilised for cabinet-making, flooring and railway sleepers.
Eucalyptus marginata
Bark
The Looming Relic, the largest jarrah tree
Roadside jarrah tree in Darling Range
A railroad tie, crosstie, railway tie or railway sleeper is a rectangular support for the rails in railroad tracks. Usually laid perpendicular to the rails, ties transfer loads to the track ballast and subgrade, hold the rails upright and keep them spaced to the correct gauge.
Wooden ties are used on many traditional railways. In the background is a track with concrete ties.
Stone block from the Kilmarnock and Troon Railway
Steel ties
Wagons with new woodties in Sweden, 2016