Saturday, April 25, 2015

Sable Falls Peak Flow

With the recent snow melt I decided we had to venture down the steps at Sable Falls to observe peak flow.  Jamey, Lois, and I checked it out a couple of days ago on a brisk but sunny afternoon.  There was some snow and ice on the steps, but it wasn't too bad.

Heading down the steps...

Peak flow...

We hiked the trail down to the beach.  There is a busy beaver hard at work.  We saw dozens of beaver chewed tree stumps.

The river has blown through the icebergs.

The erosion along the dune aligning Sable River continues.

The chill factor down the beach must have been in the low 20s.  Lois trying to stay warm....

Heading back up the steps.  Jamey checking out the falls...

Friday, April 24, 2015

Seney Wildlife Refuge

The other day my friends, Lois and Jamey Fite, had to bring their car over to Seney.  I agreed to follow them and drive them home so that we could all take a hike at the Seney Wildlife Refuge. 

This huge refuge was established in 1935 as a refuge and breeding ground for migratory birds and other wildlife. It is located in the east-central portion of Michigan’s Upper Peninsula, halfway between Lake Superior and Lake Michigan. The 95,238 acre refuge encompasses the 25,150 acre Seney Wilderness Area, which contains the Strangmoor Bog National Natural Landmark.   In comparison, the Pictured Rocks National Lakeshore is only 71,397acres, half of which is the non-manged buffer zone.

We hiked down the Marshland Wildlife drive road.

When we drove into the entrance, there was a nesting pair of geese.  First the male that tried to guide us away from his nesting mate.

The nesting female.

One of the many pools.

There was a lot of evidence of a fire from a few years ago.

Sandhill cranes....

Beaver art....

Military helicopters flew over head.




Outflow from one of the spillway management gates....

On the drive home, we stopped to document this tree that has been "decorated" by woodpeckers.

I never realized that the Whitefish Point bird observatory is a unit of the Seney National Wildlife Refuge. This 53-acre tract is renowned for its concentrations of birds during migration. Each year thousands of raptors, passerines and waterbirds funnel through the point, stopping here to replenish energy reserves before or after venturing across Lake Superior. The area is recognized as a Globally Important Bird Area for birds migrating between the US and Canada.

Thursday, April 23, 2015

Mars Rover Curiosity Update

With my month off technology and my Grand Marais adventure posts, it has been quite some time since I checked in with the progress of the Mars rover, Curiosity.  Given that it was so cold and snowy yesterday, I did not get out to exercise.  Just could not do it.  So today, I checked in with the website

The above photo shows a view from NASA's Mars Reconnaissance Orbiter taken on April 8, 2015, catches sight of NASA's Curiosity Mars rover passing through a valley called "Artist's Drive" on the lower slope of Mount Sharp.   It shows the rover's position after a drive of about 75 feet (23 meters) during the 949th Martian day, or sol, of the rover's work on Mars. North is toward the top. The rover's location, with its shadow extending toward the right, is indicated with an inscribed rectangle. The view in this image covers an area about 550 yards (500 meters) across.

A green star in the above photo marks the location of NASA's Curiosity Mars rover after a drive on the mission's 957th Martian day, or sol, (April 16, 2015). The map covers an area about 1.25 miles (2 kilometers) wide.

Curiosity landed on Mars in August 2012. The drive on Sol 957 brought the mission's total driving distance past the 10-kilometer mark (6.214 miles). The rover is passing through a series of shallow valleys on a path from the "Pahrump Hills" outcrop, which it investigated for six months, toward its next science destination, called "Logan Pass."

NASA's Curiosity Mars rover used its Navigation Camera (Navcam) to capture this view on April 11, 2015, during the 952nd Martian day, or sol of the rover's work on Mars. The rover's location was in a valley called "Artist's Drive" on the route up Mount Sharp. The view spans from east, at left, to southwest, at right. Upper Mount Sharp appears on the horizon at left.

This view from the Mars Hand Lens Imager (MAHLI) on the arm of NASA's Curiosity Mars rover is a close-up of a two-tone mineral vein at a site called "Garden City" on lower Mount Sharp. The area shown is roughly one inch (2.5 centimeters) wide. The image was taken at night, using illumination from MAHLI's light-emitting diodes, during the 935th Martian day, or sol, of Curiosity's work on Mars (March 25, 2015).

The vein includes both light-toned and dark-toned materials. The whiter material appears to have ripped up and incorporated portions of both the darker vein material (black arrows) in and a third material (white arrow ). The Curiosity mission's examination of material in these veins may provide clues about multiple episodes of fluids moving through fractured rock at this site. The fluid movement through fractures occurred later than wet environmental conditions in which the host rock formed, before it hardened and cracked.

This view from the Mast Camera (Mastcam) on NASA's Curiosity Mars rover shows a network of two-tone mineral veins at an area called "Garden City" on lower Mount Sharp.
The veins combine light and dark material. The veins at this site jut to heights of up to about 2.5 inches (6 centimeters) above the surrounding rock, and their widths range up to about 1.5 inches (4 centimeters). Figure 1 includes a 30-centimeter scale bar (about 12 inches).

Mineral veins such as these form where fluids move through fractured rocks, depositing minerals in the fractures and affecting chemistry of the surrounding rock. In this case, the veins have been more resistant to erosion than the surrounding host rock.

This self-portrait of NASA's Curiosity Mars rover shows the vehicle at the "Mojave" site, where its drill collected the mission's second taste of Mount Sharp.

The scene combines dozens of images taken during January 2015 by the Mars Hand Lens Imager (MAHLI) camera at the end of the rover's robotic arm. The pale "Pahrump Hills" outcrop surrounds the rover, and the upper portion of Mount Sharp is visible on the horizon. Darker ground at upper right and lower left holds ripples of wind-blown sand and dust.

This chart illustrates comparisons among the distances driven by various wheeled vehicles on the surface of Earth's moon and Mars. Of the vehicles shown, the NASA Mars rovers Opportunity and Curiosity are still active and the totals for those two are distances driven as of March 24, 2015.

Opportunity completed its first Mars marathon March 24, 2015 - 26.219 miles (42.195 kilometers) - with a finish time of roughly 11 years and two months. 

NASA/JPL-Caltech/Univ. of Arizona

Wednesday, April 22, 2015

The Icebergs are continuing to melt

While walking on the beach the other day, it is clear that the icebergs are melting.  We had a stiff wind from the NW yesterday, so I am guessing that the bergs are also starting to break up.  But here are some photos from a few days ago.

When the icebergs melt, they leave their "poop" rock piles behind.

The sand has really accumulated on top of the bergs.

First Creek.



The iceberg that melted at this spot spread its rocks out.