• Posts
  • RSS
  • ◂◂RSS
  • Contact

  • The Fall Line

    November 18th, 2011
    geography
    In school I learned that major cities are where they are because when people and goods mostly moved by boat you needed to be on the ocean, or at least a river. But how do we explain new york being on the ocean while richmond is well inland? It turns out that there's a geologic feature called the atlantic seaboard fall line where the composition changes rapidly from metamorphosed Paleozoic rocks to post-orogenic, flat-lying late-Mesozoic and Cenozoic rocks. This makes waterfalls, or at least rapids, and tends to mark the farthest up the river you can get most shipping:

    Comment via: google plus, facebook

    Recent posts on blogs I like:

    How much time and money does an additional child take?

    Some things scale, others don't. The post How much time and money does an additional child take? appeared first on Otherwise.

    via Otherwise March 19, 2023

    What does Bing Chat tell us about AI risk?

    Early signs of catastrophic risk? Yes and no.

    via Cold Takes February 28, 2023

    Why Neighborhoods Should Have Speed Bumps

    I have several reasons I think why neighborhoods should have speed bumps. First, speed bumps are very useful to stop cars from hitting people in the streets. Second, when construction workers installed speed bumps on the street in front of our house it was v…

    via Lily Wise's Blog Posts February 27, 2023

    more     (via openring)


  • Posts
  • RSS
  • ◂◂RSS
  • Contact