Q: In which symbiotic relationship does one organism benefit while the other organism is harmed? A. commensalism B. parasitism C. mutualism D. competition A: In parasitism does one organism benefit while the other organism is harmed.
We're going to dig it! ---------------------. Stonehenge Building Materials: For those unfamiliar with the 5 basic rock types at Stonehenge; here is a list of them in chronological order of their first arrival. 85 MYA White Chalk - The outcrop sedimentary rock of Stonehenge is Late Cretaceous Period, Santonian Age, calcium carbonate. Late Cretaceous Period outcrop sedimentary rock is the in situ construction material used by the Stonehenge builders. This material is approximately 85 million years old. This stone is called Seaford Chalk Formation rock. White in color, this building material is from Stonehenge Ditch Mining area. 3100 BC Whitestone - The oldest limestone sedimentary rock of Stonehenge is Early Carboniferous (Mississippian) Period, Arundian Age, calcium carbonate.
Bridge Construction Materials: The traditional building materials for bridges are stones, timber and steel, and more recently reinforced and pre-stressed concrete. For special elements aluminum and its alloys and some types of plastics are used. These materials have different qualities of strength, workability, durability and resistance against corrosion.