• Your EMAIL ADDRESS is never used for ANY purpose except to send you updates. EVER!!!!!!

    Join 1,043 other followers

  • MOUNT BAKER: Eruptive history, hazards, research.

    Visit Mount Baker Volcano Research Center websites Main website and the blog
  • Most recent posts

  • This website first appeared December 6, 2009

    • 650,228 hits
  • Feel free to use the material on these pages.

    Creative Commons License
    This work is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 3.0 United States License.
    Northwest Geology Field Trips, by Dave Tucker, is licensed under a Creative Commons Attribution-Noncommercial- Share Alike 3.0 United States License. You can use what you find here, repost it with attribution to the author, "remix" it for your own purposes, but may not use it with the intent of making money off of it.

    EDUCATORS: Please feel free to use anything you find here that is useful to your mission educating people about Earth science. E-mail me if it would help to have a larger or higher-resolution version of any of the images. tuckerd at geol dot wwu dot edu

  • Advertisements

White Rock, a large erratic at Hood Head, Hood Canal

Google Earth View. The yellow line is 54 feet long.

White Rock is a really large erratic lying in the water of Hood Canal, barely reachable at a low tide. It  shows up very clearly on Google Earth. Dan McShane has visited and sent the photos and some of the description used on this page. He describes it a little bit on his Reading the Washington Landscape website, here. Dan tells me that White Rock appears to be meta-sandstone that is highly recrystallized. Very hard, and hard to sample. The whiteness is from birds using it as a perch.

I have wondered just how big this monster is, since it shows up so clearly on air photos. Dan got some measurements. He says the thing is 24 feet high, 32 feet long and 30 feet wide. However, his measurements had to be “a bit rough as I was unwilling to swim around the back side of the rock. The front side required wading up to my waist despite a fairly low tide exposing starfish on the lower portions of the rock.”

White Rock from the shore. Click to enlarge. Note perched gull for scale.

However, using the measuring tool in Google Earth, it looks considerably larger. The maximum width appears to be west to east, perpendicular to the shore. I obtained 54 feet for that measurement, and 41 feet in the north- south plane. I can’t measure height in GE. This is still smaller than the reigning “Mother of All Erratics” in the Salish Lowlands, Waterman Rock on Whidbey Island.

I tested the GE measuring tool- it said that my house [plainly visible] is 21.5 feet wide, which agrees almost unbelievably well with the actual tape measurement: 21’9″. I further tested GE measurements: places near my house that measured 13.3′ and 50.26′ on GE measured 13’2″ and 50.0′ with my size-mometer (a.k.a. tape measure).

Getting there: You’ll find it at 47°53.593N 122°38.579W. White Rock is on the west shore of Hood Canal, just north of Hood Head. Hood Head is located just north of the Hood Canal Floating Bridge.

From Hood Canal Bridge: at the west end of the bridge, turn right on Paradise Bay Road. In 1/2 mile, turn right on Seven Sisters Road, which ends in 1/2 mile. Here find a short path to the beach, and pick your way in the right direction.

From US 101: Take US 101 south from the junction with WA 20 south at the head of Discovery Bay. In 2 miles, turn east on WA 104; just before you reach Hood Canal Bridge, turn left (north) on Paradise Valley Road and proceed as above.

Advertisements

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out /  Change )

Google+ photo

You are commenting using your Google+ account. Log Out /  Change )

Twitter picture

You are commenting using your Twitter account. Log Out /  Change )

Facebook photo

You are commenting using your Facebook account. Log Out /  Change )

Connecting to %s

%d bloggers like this: