SCULPTING MONTIETH ROCK

Montieth Rock is a volcanic plug rock formation in the canyon leading up from Oakridge to McCredie Springs.  Also known as “Rooster Rock,” this prominent rock formation has caught the eye of photographers of the Cascade Line from its initial construction.  The rock formation is just before Tunnel 21.  As I was building and developing my railroad model, I realized I had space to include this eye-catching rock just before the entrance to Tunnel 21, which helps conceal a tight turn around a wall corner.

 

I began the model process when I formed the base terrain of the railroad using building insulation foam and Sculptamold.  I shaped the rock base form with insulation foam, using layers of 2-inch foam which I subsequently covered with Sculptamold.  I mixed gray paint in with the Sculptamold so it appeared gray.  It sat that way for a half-dozen years.

 

Montieth Rock base form made from insulation foam slabs and Sculptamold.

 

My recent efforts laying down ground cover in this area naturally led to my continuation of forming my model of Montieth Rock.  While I considered sheathing the rock base form using plaster, I chose a clay product instead.  I used Creative Paperclay for the rock face sheathing.

This product works as clay while it remains moist.  It takes about three days for it to set/dry, whereupon it has a hard, almost ceramic consistency.  

 

While my initial use of the Paperclay was applied directly to the scenery base around the bridge abutments at Salmon Creek, I felt I needed to have a stronger bond to the base form of Sculptamold.  I applied white glue to the Sculptamold base.  I first used Aileen’s Tacky Glue, but eventually moved to simply painting on a thick white glue with a brush.  I have found various consistencies of white glue during my current scenery efforts.  I previously needed to thin this thick glue with water during ground cover application, but the thickness was a definite asset for the rock project with its extensive vertical surfaces.

 

Aileen’s Sticky Glue application to the rock base prior to applying the Paperclay surface.

 

I molded the new surface of Montieth Rock in applications over the course of several days.  This allowed me time to consider my progress and consult pictures.  Fortunately, I had a great photo of the geo-East face of the rock taken by friend David Lange that guided my efforts.  All photos I have seen of the rock have been taken of that face as it is next to Tunnel 21 and the ridge penetrated by that tunnel.  

 

Sculpting the East face of Montieth Rock.  David Lange’s photo is in the foreground.  The rock formation well earns its alternative name as it really does resemble a rooster!

 

One happy “accident” I discovered during my sheathing and sculpting process is that the Paperclay layer tended to break apart into platelets as it set, leaving cracks.  The vertical cracks are useful as similar cracks appear in David’s photo.  I filled the horizontal cracks with more Paperrclay.

 

I am now letting my sculpting efforts set thoroughly before I add coloring to the rock.  Per directions for the Paperclay, I will add a waterproof coating of varnish first.  Stay tuned….