21. Growing in a dolerite substrate at a height of. 22. Traces of methane were found at all depths, with higher levels in dolerite . 23. Since then, it is generally considered to be a dolerite dike with cracks. 24. Its volcanic dolerite cone rises above an escarpment of carboniferous sandstone and limestone layers. 25. The lighthouse was built by convict labour using locally quarried dolerite over two years. 26. Wellington sub-alpine habitats is Jurassic dolerite . 27. The Cooee Dolerite intruded the Burnie Formation at. 28. The terrane contains mostly gabbro and gneiss that show intrusions of granite and dolerite . 29. The dolerite sits on top of a bed of chalk which is visible in places. 30. The microliths here were made of dolerite , unlike those from the rest of India.
