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But Morris is wrong. Surely one cannot "invent" a good dating mechanism by simply ignoring processes which work in the opposite direction of the process which the date is based upon. Dalrymple says:
Earth's interior, like that of the other terrestrial planets, is divided into layers by their chemical or physical ( rheological ) properties. The outer layer is a chemically distinct silicate solid crust, which is underlain by a highly viscous solid mantle. The crust is separated from the mantle by the Mohorovičić discontinuity . The thickness of the crust varies from about 7003600000000000000♠ 6 km (kilometers) under the oceans to 30–50 km for the continents. The crust and the cold, rigid, top of the upper mantle are collectively known as the lithosphere, and it is of the lithosphere that the tectonic plates are composed. Beneath the lithosphere is the asthenosphere , a relatively low-viscosity layer on which the lithosphere rides. Important changes in crystal structure within the mantle occur at 410 and 7005660000000000000♠ 660 km below the surface, spanning a transition zone that separates the upper and lower mantle. Beneath the mantle, an extremely low viscosity liquid outer core lies above a solid inner core .  The Earth's inner core might rotate at a slightly higher angular velocity than the remainder of the planet, advancing by –° per year.  The radius of the inner core is about one fifth of that of Earth.
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A: Temperature is measured by thermometer. Pressure is measured by barometer. Humidity measured in unit of grains per cubic foot. Wind speed and direction is measured with an anemometer. Precipitation is measured by rain gauge.
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