When asked to describe signs of impending middle age, Britons cited a frustration with modern technology, forgetting people’s names, and thinking that teachers, doctors and policemen look very young.Buying travel sweets for car journeys and taking a flask of tea on day trips are also seen as signs of middle age, as are listening to The Archers, watching The Antiques Road Show and joining The National Trust.The model K-Ar ages for each of the samples ranged from 405.1±10 Ma to 2574.2±73 Ma.
However, the radioisotope dating of these Grand Canyon rocks clearly demonstrates that the disagreement, or isochron discordance, is pronounced.
Even when the calculated error margins are taken into account the different radioisotope dating methods yield completely different "ages" that cannot be reconciled—1240±84 Ma (Rb-Sr), 1655±40 Ma (Sm-Nd), and 1883±53 Ma (Pb-Pb) (see diagram).
Clearly visible in the canyon walls are the light-colored granites, such as the Zoroaster Granite, which are stark against the darker, folded strata of the Vishnu Schist and the other metamorphic rock units of the Granite Gorge Metamorphic Suite (see lowest purple and green shading in diagram).
These are former sedimentary and volcanic strata that have been transformed by heat and pressure, possibly during the intense upheavals when the dry land was formed on Day 3 of Creation Week.
Living a healthy and varied lifestyle helps people to keep feeling young and we see people embracing getting older.