Check the box next to “Mona Formation, Michigan”. Double click to fly there. Click on the placemark to view the sample taken from this location. This Archean metamorphosed basalt (aka “greenstone”), dated~4.0 Ga, was collected from an outcrop revealing another area of the Canadian shield in Michigan.Based on what you know about basaltic igneous environments, proto continent formation, and types of metamorphism, order the likely events of this time in Earth’s history.Tip: Review figure 11.2 in your book

Zircons contain a radioactive isotope called Uranium-238 which has a half life of 4.5 billion years (Ga). How old are these minerals?Tip: 4.5 Ga*how many half lives(don’t round up/down)=age

Open the “Angel Lake, Nevada” folder. Check the “Angel Lake, NV” placemark to fly there. What carved this valley?Tip: Consider its shape

What well known event occurred at the end of the Cretaceous period?

Check the “Gubbio, Italy” folder and double click to fly there. Click the placemark’s name to view two images representing important data from ~65 Mya. What is seen at this location and what does it provide evidence for?

Turn on the “Deserts Overlay”. What kind of desert produced this dune field?Tip: Use the overlay to determine which desert it is part of then decide what kind of desert it is. 

This rock (sample X) was found in numerous locations over several continents (see Climate Indicators map). It is very soft and burns easily. Inspect it further to better understand what has happened over time at this location.

Which of the maps provided are most beneficial when orienting the the world’s supercontinent according to its historical latitude? (i.e where the supercontinent was positioned in relation to the equator (0 degrees latitude) and the poles (90 /-90 degrees latitude))

At the base of the sequence you find a rock (sample 9). It feels like sandpaper against your fingers. Inspect sample 9 further:

A long line of volcanoes connect on the ocean floor (see Volcanoes map). Inspect sample 4 taken from a spot along this line to better understand what is happening at this location: