Explore Science-first Philosophy

Second Oceans: From Fresh to Salty

~ < 1 of audio

Author note. 

Explore voice = Exploratory style. Very punchy. Personal, and lively using “me,” “you,” “us,” and “I” freely.

I want you to feel me right there with you. We use “I” and “me” and “us” without apology. If the Explain voice is a bridge, the Explore voice is the hike we take across it. It is lively, reflective, and sometimes a bit raw. It is the sound of a shared exploration where I lead you by the hand, but we both discover the view at the same time.

This is where I get to think out loud. Not with definitions, we aren’t just looking at the facts; we are looking at how they feel and what they mean for our lives. I’m talking to you about what I’ve found and what I’m still figuring out. It is engaging because it is real, and it is reflective because it is honest.

The goal is real advice and enjoyable reading. I want to land on something you can actually use. It’s about being direct, being punchy, and making sure that by the time we reach the end of the page, we’ve both found something worth keeping.

And now the piece.

Second Oceans: From Fresh to Salty

3.5 Billion Years Ago
3.5 to 2.5 Billion Years Ago

The process of salination likely began soon after the oceans formed but took hundreds of millions of years to reach the salinity levels similar to what we see today. The oceans were likely significantly salty by about 3.5 billion years ago.

Salinity increased primarily through the weathering of rocks and the leaching of minerals (including salts) into the water. Rivers and streams carried these salts into the oceans. Volcanic activity also contributed ions to the seawater. Over time, as water cycled through evaporation and precipitation, salts became more concentrated in the oceans.

By about 2.5 Billion years ago, the oceans were likely had salinity levels similar to modern oceans.


That History Story, 

was first published on TST 2 years ago.

The flashcard inspired by it is this.

All this is part of the broader TST project.
Think of tidbits as intellectual scaffolding: modest on their own, essential to the strength of the whole.
The system favors intellectual continuity over novelty, and understanding over reaction.

The end!

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