Seastacks on Rilato Beach

Rill erosion

"The development of numerous minute closely spaced channels resulting from the uneven removal of surface soil by running water that is concentrated in streamlet of sufficient discharge and velocity to generate cutting power. It is an intermediate process between sheet erosion and gully erosion" Glossary of Geology 5th Ed

The concept of a hoodoo

The "harder rock" is protecting the lower layer form erosion - thereby creating a "hoodoo"

Capped Mini "hoodoos"

Note the harder rocks form a caprock prevening the erosion of their stand.

Hoodoos in the Badlands

Hoodoo (hoo'-doo) (a) A fantastic column, pinnacle, or pillar of rock produced in a region of sporadic heavy rainfall by differential weathering or erosion of horizontal strata, facilitated by joints and by layers of varying hardness, and occurring in varied and often eccentric or grotesque forms. Cf: earth pillar. Syn: rock pillar TopogJ. (b) hoodoo column. Etymol: African; from its fancied resemblance to animals and embodied evil spirits. " Glossary of Geology 5th Edition

Door Trail In the Badlands National Park

Hoodoo on Castle to Fossil Trail Badlands Nat'l Park

Hoodoo (hoo'-doo) (a) A fantastic column, pinnacle, or pillar of rock produced in a region of sporadic heavy rainfall by differential weathering or erosion of horizontal strata, facilitated by joints and by layers of varying hardness, and occurring in varied and often eccentric or grotesque forms. Cf: earth pillar. Syn: rock pillar TopogJ. (b) hoodoo column. Etymol: African; from its fancied resemblance to animals and embodied evil spirits. " Glossary of Geology 5th Edition

Hoodoo Castle to Fossil Trail Badlands Nat'l Park

Castle to Fossil Trail Badlands Nat'l Park

Sorting pattern creates patterns

Boxworks

"Boxwork (speleo) In dissolution caves, a network of resistant intersecting fins, usually of calcite (also quartz, gypsum, anhydrite, limonite, silica, or other minerals) that project outward from the intervening, more deeply weathered bedrock. Common in present or former sulfate or sulfide zones in karst (Palmer and Palmer, 1995)." Glossary of Geology 5th Edition

Boxworks Wind Cave National Park

"boxwork (speleo) In dissolution caves, a network of resistant intersecting fins, usually of calcite (also quartz, gypsum, anhydrite, limonite, silica, or other minerals) that project outward from the intervening, more deeply weathered bedrock. Common in present or former sulfate or sulfide zones in karst (Palmer and Palmer, 1995)." Glossary of Geology 5th Edition

Boxworks

"Boxwork (speleo) In dissolution caves, a network of resistant intersecting fins, usually of calcite (also quartz, gypsum, anhydrite, limonite, silica, or other minerals) that project outward from the intervening, more deeply weathered bedrock. Common in present or former sulfate or sulfide zones in karst (Palmer and Palmer, 1995)." Glossary of Geology 5th Edition MORE INFO https://www.nps.gov/wica/learn/nature/speleothems-boxwork.htm

Cohab Canyon Trail

Debris Flow

Serpentine to Kotzubue

Tor

tor   A high, isolated crag, pinnacle, or rocky peak; or a pile of rocks, much-jointed and usually granitic, exposed to intense weathering, and often assuming peculiar or fantastic shapes, e.g. the granite rocks standing as prominent masses on the moors of Devon and Cornwall, England. Linton (1955) suggested that a tor is a residual mass of bedrock resulting from subsurface rotting through the action of acidic groundwater penetrating along joint systems, followed by mechanical stripping of loose material. Periglacial processes may also be important in the formation of tors. Etymol: Celtic(?). Cf: core-stone; elephant rock. Neuendorf, Klaus. Glossary of Geology, Fifth Edition, Revised . American Geosciences Institute. Kindle Edition.

Tor

tor   A high, isolated crag, pinnacle, or rocky peak; or a pile of rocks, much-jointed and usually granitic, exposed to intense weathering, and often assuming peculiar or fantastic shapes, e.g. the granite rocks standing as prominent masses on the moors of Devon and Cornwall, England. Linton (1955) suggested that a tor is a residual mass of bedrock resulting from subsurface rotting through the action of acidic groundwater penetrating along joint systems, followed by mechanical stripping of loose material. Periglacial processes may also be important in the formation of tors. Etymol: Celtic(?). Cf: core-stone; elephant rock. Neuendorf, Klaus. Glossary of Geology, Fifth Edition, Revised . American Geosciences Institute. Kindle Edition.

Tor

tor   A high, isolated crag, pinnacle, or rocky peak; or a pile of rocks, much-jointed and usually granitic, exposed to intense weathering, and often assuming peculiar or fantastic shapes, e.g. the granite rocks standing as prominent masses on the moors of Devon and Cornwall, England. Linton (1955) suggested that a tor is a residual mass of bedrock resulting from subsurface rotting through the action of acidic groundwater penetrating along joint systems, followed by mechanical stripping of loose material. Periglacial processes may also be important in the formation of tors. Etymol: Celtic(?). Cf: core-stone; elephant rock. Neuendorf, Klaus. Glossary of Geology, Fifth Edition, Revised . American Geosciences Institute. Kindle Edition.

Tor

tor   A high, isolated crag, pinnacle, or rocky peak; or a pile of rocks, much-jointed and usually granitic, exposed to intense weathering, and often assuming peculiar or fantastic shapes, e.g. the granite rocks standing as prominent masses on the moors of Devon and Cornwall, England. Linton (1955) suggested that a tor is a residual mass of bedrock resulting from subsurface rotting through the action of acidic groundwater penetrating along joint systems, followed by mechanical stripping of loose material. Periglacial processes may also be important in the formation of tors. Etymol: Celtic(?). Cf: core-stone; elephant rock. Neuendorf, Klaus. Glossary of Geology, Fifth Edition, Revised . American Geosciences Institute. Kindle Edition.

Tor

tor   A high, isolated crag, pinnacle, or rocky peak; or a pile of rocks, much-jointed and usually granitic, exposed to intense weathering, and often assuming peculiar or fantastic shapes, e.g. the granite rocks standing as prominent masses on the moors of Devon and Cornwall, England. Linton (1955) suggested that a tor is a residual mass of bedrock resulting from subsurface rotting through the action of acidic groundwater penetrating along joint systems, followed by mechanical stripping of loose material. Periglacial processes may also be important in the formation of tors. Etymol: Celtic(?). Cf: core-stone; elephant rock. Neuendorf, Klaus. Glossary of Geology, Fifth Edition, Revised . American Geosciences Institute. Kindle Edition.

Arctic Village, Nunavut

pinnacle [geomorph] (pin'-na-cle)  (a) A tall slender tapering tower or spire-shaped pillar of rock, either isolated or at the summit of a mountain or hill; esp. a lofty peak. (b) A hill or mountain with a pointed summit. Neuendorf, Klaus. Glossary of Geology, Fifth Edition, Revised . American Geosciences Institute. Kindle Edition.