Editing 1194: Stratigraphic Record
Warning: You are not logged in. Your IP address will be publicly visible if you make any edits. If you log in or create an account, your edits will be attributed to your username, along with other benefits.
The edit can be undone.
Please check the comparison below to verify that this is what you want to do, and then save the changes below to finish undoing the edit.
| Latest revision | Your text | ||
| Line 8: | Line 8: | ||
==Explanation== | ==Explanation== | ||
| − | We have no rock formations on Earth older than about 3.5 billion years, as the comic points out, because everything solid from before that time has been {{w|Subduction|subducted}} down into the {{w|Mantle (geology)|Earth's mantle}}, by {{w|Plate tectonics|tectonic movement}}. The title text hints at the cooler {{w|Moon}} which stopped re-melting its surface much sooner, so we theoretically could learn something about | + | We have no rock formations on Earth older than about 3.5 billion years, as the comic points out, because everything solid from before that time has been {{w|Subduction|subducted}} down into the {{w|Mantle (geology)|Earth's mantle}}, by {{w|Plate tectonics|tectonic movement}}. The title text hints at the cooler {{w|Moon}} which stopped re-melting its surface much sooner, so we theoretically could learn something about Earth’s history from examining our Moon’s surface and makeup. {{w|Zircon|Zircons}} are a type of mineral found in the {{w|Crust (geology)|Earth’s crust}}, some of which have been estimated to be as old as 4.4 billion years, older than any other mineral. |
| + | |||
| + | Anyways, here the Earth is anthropomorphized and actively teases the narrator; first it asks the narrator to draw in closer, as if it's about to tell us a secret, but then it whispers "I'll never tell". Not a lot to this one. | ||
==Transcript== | ==Transcript== | ||
| − | :[Image of the | + | :[Image of the earth from space.] |
:Nearly 4.5 billion years ago, Earth had liquid water. | :Nearly 4.5 billion years ago, Earth had liquid water. | ||
:But all the crust older than 3.5 billion years has been recycled into the mantle by subduction. | :But all the crust older than 3.5 billion years has been recycled into the mantle by subduction. | ||
| − | |||
:A billion years of the stratigraphic record, the memory of the hills, is forever lost to us. | :A billion years of the stratigraphic record, the memory of the hills, is forever lost to us. | ||
| − | :What was it | + | :What was it ''like'' here, four billion years ago? |
| − | |||
:Earth, | :Earth, | ||
| − | :What | + | :What ''secrets'' do you have? |
| − | |||
:Earth: come closer | :Earth: come closer | ||
| − | :[Zoom in on the Earth | + | :[Zoom in on the Earth.] |
| − | |||
:Earth: ''i'll never tell.'' | :Earth: ''i'll never tell.'' | ||
{{comic discussion}} | {{comic discussion}} | ||
| − | |||
| − | |||
[[Category:Comics with color]] | [[Category:Comics with color]] | ||
| − | |||
| − | |||
