Many dykes and veins of leucocratic microgranite, aplite, quartz, rare pegmatites, dolerite
and rhyolite are emplaced in the granite.
Sample Collection: Blocks of dolerite
were collected from various locations of Kirana hills (Figure-2).
Based on industrial seismic data the size of the presumable area in which dolerite
intrusions occur ranges from 30 to 60 km in east-west direction, and is about 100 km in north-south direction (Fig.
my earliest memory: a radiant moon silently rising above the rim of our backyard in its light I saw my slender shadow fall endlessly through a craggy, cold eternity- there where I stood in a landscape of dolerite
by day a Namaqua woman looked after me her clicking speech echoed in my Afrikaans a magnet that must hold me here in the moon's trance the language that has me holding on tight as across Africa's cracked lip its fevered breath blows hard
And next moment we're swerving between massive dolerite
columns and cliffs in jet- boat style, ensuring we hit neither.
During the summer, tens of thousands of birds, including more than 36,000 pairs of puffins, over 1,000 pairs of Arctic Turns, 1,900 breeding shags, and even a few Shelduck, Ringed Plovers, Barn Swallows and Rock Pipits visit the islands' igneous dolerite
outcrops that once provided homes to saints like Aidan and Cuthbert.
Built on an outcrop of dolerite
close to the shore, it has connections to English royalty that date back to the 12th century.
However, some scientists who have studied the unique geology of the Karoo, with its widespread intrusion of dolerite
dykes and sills, have expressed concern that there exists the possibility of contaminants reaching the groundwater system.
Thomas identified Carn Meini as the source of spotted dolerite
bluestones, but a new analysis of the rocks' chemical makeup has fingered Carn Goedog as the true home of at least 55 percent of those used at Stonehenge, according to Planet Earth.
We soon pass a large mass of rock composed of dolerite
with layers of sandstone and shale at its base and, after crossing a wooden footbridge, steps take us over a wall.
The rocks which make up Snowdon are mostly volcanic in origin with Rhyolite and Dolerite
being the most common.
Drilling intersected broad zones of gold mineralisation associated with a wedge of felsic volcanics bounded by dolerite