Tree on a cliff at Sunset Bay State Park
No landscape photographer likes a bald blue sky but after a couple rainy days every sunshine is welcome, with or without clouds. Off the Oregon coast the Juan de Fuca Plate, an oceanic plate, slides under the continental plate of North America, creating a subduction zone. Many rock formations can tell this geologic story especially along the coast line southwest of Coos Bay. Gigantic waves crash into the rocks and it is really not difficult to find a pleasing composition even without some perfect clouds.
Sedimentary rocks have been tilted at steep angles, very well visible at Shore Acres State Park.
Concretions in the surf at Shore Acres
Sand deposits that accumulated along the ancient coast were eventually hardened to form sandstone. A Concretion develops when calcite crystallizes around an object within the sand, perhaps a seashell fragment. This zone of mineralization gradually increases in diameter, causing the concretion to grow like a pearl in an oyster. Concretions are more durable than the surrounding sandstone, and on weathered rock faces they commonly resemble stone cannonballs. (source: George Musteo, The Geologic Story, researchgate.net).