When did these events in earth's timeline occur?

i need some help with this homework. i need to make a geologic timeline of many different events which happened in earth's history...ive done most of them, but i was unsuccessful in getting the dates and periods for these:

%26gt; Antarctica splits from Australia

%26gt; Opening of North Atlantic

%26gt; Establishment of U.S.A.

%26gt; The Egyptian Pyramids are erected

%26gt; Opening of Southern Atlantic

if someone can help me with, those, i will award 10 points to whoever answers the most! please help and thank you in advance! ^_^

When did these events in earth's timeline occur?opera singer

Australia was once part of the giant continent Gondwana which included Africa , South America and India. About 150 million years ago Australia and Antarctica split from Gondwana and 1 million years later Australia broke away from Antarctica and moved north.

http://www.csu.edu.au/division/internat/...

The opening of the present-day Atlantic Ocean was presaged by rift faulting and related sedimentation on the eroded surface of the Appalachians beginning about 230 million years ago.

http://www.britannica.com/eb/article-414...

US independence

- Declared July 4, 1776

- Recognized September 3, 1783

http://en.wikipedia.org/wiki/United_Stat...

the pyramids are more confusing. the big 3 at Giza were built between c. 2589 BC - 2504 BC, but the entire period of Pyramid building was from c. 2630 BC - 1814 BC

http://en.wikipedia.org/wiki/Egyptian_py...

The opening of the South Atlantic Ocean is recorded in a series of Mesozoic and Cenozoic basins that developed along the present Atlantic margin. Most of these basins have clastic red beds that date to the Late Jurassic and Early Cretaceous periods (about 163 to 97.5 million years ago).

http://www.britannica.com/eb/article-417...

good luck, google is a wonderful thing.

~~~ morgannia

When did these events in earth's timeline occur?amc theater opera theater

1. Australia split from Antarctica 96 million years ago in the Cretaceous Period'

that is all I have.

3.Establishment of U.S.A. July 4,1776