Its 43 in portland right now... normally oregon is cold and very snowy in the mountainous areas and warmer in the winter with drizzles in the lower regions. The summers are hot and there is often rain in areas such as portland, corvalis, and albany.<span />
Answer: Igneous Rock
Explanation: Radiometric dating is used to date rocks by measuring the decay of their composite materials. Stable isotopes remain the same over time while the nucleus of an unstable or radioactive isotope will decay to form other isotopes
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Dating rocks using Isotopic methods uses the decay time of the isotope in the rock to assess its age. The accuracy of this method is assured by the fact that when these isotopes decay, they are retained in the rock. Isotopic dating is not very accurate in sedimentary rocks because they contain particles from older rocks.
Consider a time when mars is in the middle of one of its periods of apparent retrograde motion. during this time, mars appears <u>brightest</u> in our night sky and crosses the meridian around <u>midnight</u>.
Convergent plates.
Hope this helped, have a great day! :D
