• Posts
  • RSS
  • ◂◂RSS
  • Contact

  • The Fall Line

    November 18th, 2011
    geography  [html]
    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:

    What I've been doing instead of writing

    I’ve been too busy with work to write much recently, but in lieu of that, here’s a batch of links to other stuff I’ve been doing elsewhere. The thing I’m most excited about: Wave raises $200m from Sequoia, Stripe, Founders Fund and Ribbit at a $1.7b valuati…

    via benkuhn.net September 11, 2021

    Some reasons to measure

    A question I get asked with some frequency is: why bother measuring X, why not build something instead? More bluntly, in a recent conversation with a newsletter author, his comment on some future measurement projects I wanted to do (in the same vein as ot…

    via Posts on Dan Luu August 27, 2021

    Songs about terrible relationships

    [Spoilers for several old musicals.] TV Tropes lists dozens of examples of the “I want” song (where the hero of a musical sings about their dream of escaping their small surroundings). After watching a bunch of musicals on maternity leave, I’m wondering h…

    via The whole sky July 17, 2021

    more     (via openring)


  • Posts
  • RSS
  • ◂◂RSS
  • Contact