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Zircon crystals provide evidence that the first ocean formed during the Hadean eon, between 4.4 and 4 billion years ago. Originally, there was only one ocean, because there were no continents to divide it into smaller parts. It was green because of the vast amounts of iron dissolved in it, until the first photosynthetic organisms created oxygen, which bound to the iron, creating rust that sank to the sea floor, leaving the oceans blue like they are today.
What else can I help you with?
When did animal life first appear in the oceans?
Animal life first appeared in the oceans around 600 million years ago during the Ediacaran period.
What happened in 3 billion bc?
Those were the First signs of primeval life (bacteria and blue-green algae) appear in oceans.
Where seagull appear?
Seagulls can be found worwide in the oceans esp...the pacific oceans and asia including north america!
Why do some oceans appear blue while others appear green?
The color of the ocean appears blue or green based on the amount of phytoplankton and the depth of the water. Oceans with less phytoplankton and deeper water tend to appear blue, while those with more phytoplankton and shallower water tend to appear green.
Why do tides appear at both sides of the earth?
It is the effect of the moon's gravity on earth's oceans.
Why are the oceans blue?
The oceans appear blue because water molecules absorb colors in the red part of the light spectrum, while reflecting and scattering blue light. This gives the oceans their characteristic blue color.
When did the dinosaurs first appear?
They appear in the fossil record in the late Triassic about 230 million years ago and go extinct around 65 mya.
Why don't the moon appear blue like earth?
Because it doesn't have oceans . . . And the question should be, "Why DOESN'T the moon appear blue like Earth?"
Did animal appear first or did plant appear first?
Scientists believe that animals evolved from single-celled organisms in the oceans around 600 million years ago, making them the first to appear. Plants, on the other hand, evolved from ancient algae and appeared on land around 450 million years ago.
Where do hurricanes usually appear?
Along the equator and oceans. It's this combination of moisture and heat that creates hurricanes.
How do scientists explain the fact that some landforms that are far apart and separated by oceans appear to be related?
Erosion
How do scientists explain the fact that some landform that are far apart and separated by oceans appear to be related?
Erosion
