The trulli are made of roughly worked limestone boulders collected from neighbouring fields. Characteristically, they feature pyramidal, domed or conical roofs built up of corbelled limestone slabs.

Limestone is dissolved very slowly over a period of time. Erratics at Norber are boulders of gritstone standing on a plinth of limestone. The boulders protect the limestone from chemical weathering.

Kristian Buus/Greenpeace The government said the boulders would have "minimal impact" Greenpeace said the limestone boulders, weighing between 500kg (78st 10lb) and 1,400kg (220st 6lb), "make it ...

The unassuming entry court further camouflages at the approach, through the use of limestone boulders collected from the excavation and lush vegetation. The exterior opening of the cave is capped ...

The owner of a limestone quarry above Glenwood Springs has spent several years arguing that its contentious plan for an ...

further camouflaged at the approach by limestone boulders collected from the excavation and lush vegetation. The exterior opening of the cave is capped with a board-formed concrete portal ...

The weathered limestone boulders that are a feature of Forest Hill were once sediment on the floor of a shallow sea that covered much of what is now Southland sometime between 25 and 15 million years ...

It is exotic: it sits next to an ancient village settlement, and is perpetually warm. It is huge: the stone, gigantic limestone boulders from about 4m to 18m tall at the base of a 400m wall." During ...

The weathered limestone boulders that are a feature of Forest Hill were once sediment on the floor of a shallow sea that covered much of what is now Southland sometime between 25 and 15 million years ...

It was not intentional. There is no excuse. It’s really disheartening what occurred,” said developer David Martin.