Click to enlarge

Diverging and Converging Plate Boundaries

These materials prompted me to feel more at home with constant change, the truth of our existence. Growing in my mind continually are mental pictures of the forces and biggest systems interacting beyond my comprehension, yet a fascination and source of awe and interest in how academic disciplines keep redefining.

No wonder collaborations are increasing!



Costa Rican Accretionary Prism
Costa Rican Accretionary Prism

The sediment has been ground by tectonic plates scraping against each other. It's very fine-grained and after it's applied to the clay it dries and contracts and peels up like a dried riverbed cracks but then, in the kiln, it melts and relaxes back down. More about the material here.

Converging and Diverging Plate Boundaries on Porcelain
Costa Rican Accretionary Prism on Porcelain
Costa Rican Cup
Costa Rican Subduction Cup
Folding Fracturing Fissuring on porcelain
Friction at Subducting Plates
Friction at Subducting Plates

5" x 2.5"

On porcelain clay, a good example of how the Costa Rican Accretionary Prism sediment looks when applied thinly and thickly. Center of seaglass. Rim and foot glazes assembled from refined materials.


Availability: Usually ships in 2-3 business days

BL-71Price: US$195.00 US$150.00
Coverging and Subducting
Coverging and Subducting

4" x 2"

On porcelain, click for larger image to read words. Brown glaze is from the Costa Rican Accretionary Prism. Center of seaglass, rim and foot assembled from refined materials.


Availability: Usually ships in 2-3 business days

BL-096Price: US$95.00 US$47.50
Diverging & Converging plates
Diverging & Converging plates

8" x 4"

On porcelain. Costa Rican sediment contracted and curled before it melted, in contrast to smooth, semi-sheer Earth crust. Seaglass center. Click multiple times to see back and side views and read words.


Availability: Usually ships in 2-3 business days

BL-807US$225.00
Diverging & Converging Plates
Diverging & Converging Plates

5.5" x 3"

On porcelain clay, "Subducting friction forcing divergence at Mid-Atlantic Ridge". Interior from Costa Rican accretionary prism and exterior of rock slurry from Kane Fracture Zone, applied to a surface that had been chattered when the bowl was leather-hard. Rim and foot of glazes assembled from refined materials.


Availability: Usually ships in 2-3 business days

BL-833US$250.00
Pumice & Rock Slurry: Earth's Insides are OUT
Pumice & Rock Slurry: Earth's Insides are OUT

7.5" x 2.25"

On porcelain clay, seaglass center surrounded by Mid-Atlantic Ridge and Havre volcano pumice/mud. Rim and foot of glazes assembled from refined materials.


Availability: Usually ships in 2-3 business days

PBL-111US$300.00
Mid-Atlantic Ridge Above and Below Sea Level
Mid-Atlantic Ridge Above and Below Sea Level

A clay slab with inner rectangle dipped into rock slurry from Mid-Atlantic Ridge (area called Kane Fracture Zone) and hung by stainless steel cable wrapped around stones from the rift valley in Iceland -- playing with continuity of that long ridge that keeps spreading. Frame is glazed with ladles from 6 buckets from location extremes of north, south, east and west plus high-carbonate and high-silica samples.

Writing includes a description about the Kane Fracture Zone material.


Availability: Usually ships in 2-3 business days

WL--3Price: US$600.00 US$300.00
New Zealand & Woods Hole ~ Spreading & Colliding
New Zealand & Woods Hole ~ Spreading & Colliding

11" x 11".

Across continents, across time zones, the world upside-down, two cohorts find each other and co-create; His form, Her glazes. No! Earth's glazes -- Gaia's glazes. Just the evidence of materials changed in a kiln. Thanks to Brian Gartside!


Availability: Usually ships in 2-3 business days

BeeG-1US$150.00
Subduction Sediment on Porcelain
Subduction Sediment on Porcelain

5/25" x 2.5"

Says, "Costa Rican accretionary prism subducting, folding, fracturing, fissuring". Rim glaze assembled from refined materials. Center of sea-glass.


Availability: Usually ships in 2-3 business days

PBL-71US$225.00
Mid-Atlantic Ridge Rock Slurry
Mid-Atlantic Ridge Rock Slurry

6" x 2"

With coordinates. Rock slurry is thin and transparent on the back, applied more thickly on the interior chatter-patterned area. Glazes assembled from refined materials are celadon and copper green (Oribe).


Availability: Usually ships in 2-3 business days

BL-49US$225.00
EVIDENCE: Ceramics from Earth's Kiln and Mine
EVIDENCE: Ceramics from Earth's Kiln and Mine

Some WOW stuff came from the kiln over twenty years of melting muds and rocks. Some I photographed and have assembled into a set of twelve cards you can see as thumbnails and a slideshow here. Cards are blank inside EXCEPT a thirteenth with a LEGEND inside -- it refers to numbers on each card.

NOTE about shipping: $7.50 is the cost of one in a Flat Rate USPS box but website only calculates UPS. If you need shipping, I'll subtract the difference between $7.50 and the UPS charge so you'll pay the lower cost. If you're buying multiple boxes, I'll probably use UPS; if in doubt, contact me.


Availability: Usually ships in 2-3 business days

SET-70US$25.00
Kane Fracture Zone (no writing)
Kane Fracture Zone (no writing)

6" x 2.25"

On porcelain, Earth crust slurry is brown glaze on the back. Interior is a copper red glaze assembled from refined materials. Copper volatilizes during firing and the areas of green and red show the air circulation that carried that copper through the kiln's chamber at high temperature.


Availability: Usually ships in 2-3 business days

PBL-29Price: US$95.00 US$47.50
Converging and Diverging Plate Boundaries on Porcelain
Converging and Diverging Plate Boundaries on Porcelain

4.25" x 3"

Top exterior is Earth crust slurry from Mid-Atlantic Ridge and bottom half is from Costa Rican subduction zone. Interior shiny whitish glaze assembled from refined materials.


Availability: Usually ships in 2-3 business days

5-C44US$60.00
"Converging and Diverging Plate Boundaries"
"Converging and Diverging Plate Boundaries"

12" x 1.75"

Center of sea-glass is surrounded by an area of chattered porcelain clay that was glazed with rock slurry from the Kane Fracture Zone, and area of the Mid-Atlantic Ridge. outside of that is fine-grained sediment from the Costa Rican accretionary prism, an area of subducting plates under immense pressure from friction.


Availability: Usually ships in 2-3 business days

FP-53US$595.00
Diverging and Converging Plate Boundaries
Diverging and Converging Plate Boundaries

4.5" wide x 2.75" high

Exterior chatter pattern is the Mid-Atlantic Ridge rock slurry also known as the Kane Fracture Zone. It also surrounds the sea-glass center. The speckled brown sediment glaze is from a subduction zone some people call the Costa Rican accretionary prism.


Availability: Usually ships in 2-3 business days

FB-86US$245.00
Subduction, Erupting, Remagmatizing (3 Places 3 Textures)
Subduction, Erupting, Remagmatizing (3 Places 3 Textures)

5.5" x 1.25"

The words describe dynamics at three sources of interior glaze. From center outward: Havre pumice-mud (erupting), Kane Fracture Zone (remagmatizing) and Costa Rican accrectionary prism (subducting). Click on back image to read the words.


Availability: Usually ships in 2-3 business days

FB-80US$195.00