Planet rock dating website
In geology, when an igneous intrusion cuts across a formation of sedimentary rock, it can be determined that the igneous intrusion is younger than the sedimentary rock.
There are a number of different types of intrusions, including stocks, laccoliths, batholiths, sills and dikes.
Over 1,500,000 Daters login every day to Plentyoffish.com, we are the market leader in Canada, UK, Australia, US, Ireland and New Zealand, so come meet and chat with other White Rock singles Register HERE The only 100% Free dating service.
The Permian through Jurassic stratigraphy of the Colorado Plateau area of southeastern Utah is a great example of Original Horizontality and the Law of Superposition, two important ideas used in relative dating.
From top to bottom: Rounded tan domes of the Navajo Sandstone, layered red Kayenta Formation, cliff-forming, vertically jointed, red Wingate Sandstone, slope-forming, purplish Chinle Formation, layered, lighter-red Moenkopi Formation, and white, layered Cutler Formation sandstone.For example, in sedimentary rocks, it is common for gravel from an older formation to be ripped up and included in a newer layer.A similar situation with igneous rocks occurs when xenoliths are found.Cross-cutting relations can be used to determine the relative ages of rock strata and other geological structures.Explanations: A – folded rock strata cut by a thrust fault; B – large intrusion (cutting through A); C – erosional angular unconformity (cutting off A & B) on which rock strata were deposited; D – volcanic dyke (cutting through A, B & C); E – even younger rock strata (overlying C & D); F – normal fault (cutting through A, B, C & E).