Relative dating of rocks ppt
The country's different volcano and lava types originate from different tectonic settings and types of volcanic eruptions, ranging from passive lava eruptions to violent explosive eruptions.Canada has a rich record of very large volumes of magmatic rock called large igneous provinces.In practice, I find the easiest way to do this is to: Also see this question and answers: Nice network diagram editor?
It has a very complex volcanological history spanning from the Precambrian eon at least 3.11 billion years ago when this part of the North American continent began to form.
I believe a solution that has been completely overlooked for far too long is Visual Paradigm.
It's closed source, but it has a free community edition (non-commercial use) and is very stable and polished. Many of the suggestions in other answers are good stand-ins for Visio for general diagramming.
Like other Hawaiian eruptions, the relative volume of ejected pyroclastic material is less than that of all other eruption types.
The main phenomenons during Hawaiian eruptions is steady lava fountaining and the production of thin lava flows that eventually build up into large, broad shield volcanoes.