A grain of zircon in a
sandstone is dated at 3 billion years. But the
sandstone is from a unit of rock dated at 250
million years old. Explain how this can be.

Match the following events to the effects they produced. fall of constantinople italian wars hundred years’ war paved the way for the entry of renaissance ideas of peace and renewal arrowright caused an influx of classical greek and roman knowledge and texts into europe arrowright led to the introduction of renaissance thought and ideas to france arrowright