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| Nats on Mt Basalt |
Rising
above the surrounding countryside Mt Basalt has two main rocky, ridge-shaped
peaks and several smaller rocky ridges composed of basalt and flanked by scree and
associated soils. On arrival the group of eighteen naturalists dispersed,
some to climb one, or other, or both ridges to look at the slanting, exposed
basalt columns and the stunning 180o views of the Darling Downs.
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| Columns on the southern peak |
During
morning tea it was explained that
the mottled appearance of the basalt was caused by large dark crystals of
pyroxene (magnesium and iron silicate). Basalt is a very fine grained, extrusive, igneous rock formed from the rapid cooling of low-viscosity lava rich
in magnesium and iron (mafic lava) exposed at or very near the surface. More
than 90% of all volcanic rock on Earth is basalt. It is usually dark grey to black in colour.
A plant “Show and Tell” identified Ruby
Saltbush (Enchaelena tomentosa), Darling Pea (Swainsona galegifolia),
Kunkerberry/Currant Bush (Carissa ovata), Small-leaf Bluebush (Mairena
microphylla), Gall Weed (Zygophyllum apiculatum), and Bitter Bark (Alstonia
constricta).
Leaving
Mt Basalt, the convoy drove to the historical Kooroongarra Cemetery that lies
at some distance from the ghost town of that name. The graves of early settlers are a poignant
reminder of harsh lives with the deaths of many young children. One grave, apart
from others, is the resting place of Mr Haine, a gentleman reputed to have been
7’6” tall. In its heyday Kooroongarra boasted a church, cheese factory,
butchery, general store, a tennis court, and was the hub of the region’s social
activities.
The great-grandson of the Very Tall Man, kindly allowed us access to his
property where we lunched in a paddock perched above a bend in a small
sandy, creek, observed by inquisitive cattle.
During lunch one of our members described her
life on the family farm which was in the area and today is run by her brother. How lucky we were
to get first-hand knowledge of this small, relatively unknown corner of the
Downs.
Species Lists: Mount Basalt & Kooroongarra - compiled from members' observations
introduced species = *
Fauna discussed
or taken note of on the day (not a comprehensive list):
Birds: White-necked Heron, Yellow-billed Spoonbill, Nankeen
Kestrel, Little Corella, Sulphur-crested Cockatoo, Pale-headed Rosella, Rainbow
Bee-eater, Superb Fairy-wren, Variegated Fairy-wren, Gerygone sp., Spiny-cheeked
Honeyeater, Yellow-faced Honeyeater, Brown-headed Honeyeater, Grey-crowned
Babbler, Rufous Whistler, Grey Shrike-thrush, Olive-backed Oriole, Grey
Butcherbird, Pied Butcherbird, Australian Magpie, Willie Wagtail, Apostlebird, Magpie-lark,
Silvereye, Mistletoebird, Double-barred Finch.
Butterflies: Clearwing Swallowtail (Cressida cressida), Caper White (Belenois java), Lesser Wanderer (Danaus petilia), Common Crow (Euploea
core).
Flora
discussed or taken note of on the day (not a comprehensive list):
Ferns: Poison Rock Fern or
Mulga Fern (Cheilanthes sieberi).
Herbs: Forest Daisy (Brachyscome
macrocarpa), Yellow Burr Daisy (Calotis
sp.), White Burr Daisy (Calotis
cuneifolia), Yellow Buttons (Chrysocephalum
apiculatum), Star Goodenia or Round-leaf Goodenia (Goodenia rotundifolia), Gallweed (Roepera apiculata), *a Prickly nightshade (Solanum sp.), Warrigal Greens (Tetragonia
tetragonoides), a Native Bluebell (Wahlenbergia
sp.).
Vines: Wonga
Vine (Pandorea pandorana).
Shrubs: Kunkerberry (Carissa ovata), Narrow-leafed Hop Bush (Dodonaea viscosa subsp. angustifolia),
Red Berry Saltbush (Einadia hastata),
Ruby Saltbush (Enchylaena tomentose),
Winter
Apple (Eromophila debilis), Dogwood (Jacksonia
scoparia), Small-leaf Bluebush (Maireana microphylla), Hedge Saltbush (Rhagodia spinescens), Galvanised Burr (Sclerolaena birchii), Darling Pea (Swainsona galegifolia).
Trees: Bulloak (Allocasuarina luehmannii), Bitterbark (Alstonia constricta), Sweet Bursaria (Bursaria spinosa), White Cypress Pine (Callitris glaucaphylla), Poplar Box (Eucalyptus populneus).