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Boulder in British Columbia, Canada Kämmenkivi stone on the Pisa hill in Kuopio, Finland 2'500 Million years old rocks on a hill in Hyderabad, India. In geology, a boulder (or rarely bowlder) [1] is a rock fragment with size greater than 25.6 cm (10.1 in) in diameter. [2] Smaller pieces are called cobbles and pebbles.
A blockfield [1] (also spelt block field [2]), felsenmeer, [1] boulder field [1] [2] or stone field [2] is a surface covered by boulder- or block-sized rocks usually associated with a history of volcanic activity, alpine and subpolar climates and periglaciation.
Western Stone, Temple Mount Block Jerusalem, Israel [33] Herod, King of Judea during the Second Temple period Weight is disputed; a 2006 analysis estimated the depth of this stone at only 1.8–2.5 m, for a weight of 250–300 t. [32] Weight formerly said to be 550 to 600 t. [34] [35] 230 t [36] Mausoleum of Theodoric: Roof slab Ravenna, Italy
Cyclopean masonry, backside of the Lion Gate, Mycenae, Greece. Cyclopean masonry is a type of stonework found in Mycenaean architecture, built with massive limestone boulders, roughly fitted together with minimal clearance between adjacent stones and with clay mortar or [1] no use of mortar.
Moeraki Boulders – Large spherical boulders on Otago coast, New Zealand Mushroom Rock State Park – State park in Kansas, United States Nodule (geology) – Small mass of a mineral with a contrasting composition to the enclosing sediment or rock, a replacement body , not to be confused with a concretion
The Rollstone Boulder is a granite glacial erratic [1] [2] described by Peter Cristofono in his article "Minerals of Rollstone Hill" as being composed of "porphyritic Kinsman quartz monzonite." The phenocrysts in the boulder are plainly visible large white feldspar crystals. [3] The boulder weighs 110 short tons (100 t) and is 10 feet (3.0 m ...
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Bowder Stone, 2009. The Bowder Stone is a large andesite lava boulder, [1] that fell 200 metres (660 ft) from the Bowder Crag on Kings How between 13,500 and 10,000 years ago. [2] [3] The stone is situated in Borrowdale, Cumbria, England, at grid reference NY25401639. It is estimated to weigh around 2000 tons and is about 30 feet (9.1 m) high ...