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- Laccolith abstract "A laccolith is a sheet intrusion (or concordant pluton) that has been injected between two layers of sedimentary rock. The pressure of the magma is high enough that the overlying strata are forced upward, giving the laccolith a dome or mushroom-like form with a generally planar base.Laccoliths tend to form at relatively shallow depths and are typically formed by relatively viscous magmas, such as those that crystallize to diorite, granodiorite, and granite. Cooling underground takes place slowly, giving time for larger crystals to form in the cooling magma. The surface rock above laccoliths often erodes away completely, leaving the core mound of igneous rock. The term was first applied as laccolite by Grove Karl Gilbert after his study of intrusions of diorite in the Henry Mountains of Utah in about 1875.It is often difficult to reconstruct shapes of intrusions. For instance, Devils Tower in Wyoming was thought to be a volcanic neck, but study has revealed it to be an eroded laccolith. The rock would have had to cool very slowly so as to form the slender pencil-shaped columns of phonolite porphyry seen today. However, erosion has stripped away the overlying and surrounding rock, and so it is impossible to reconstruct the original shape of the igneous intrusion; that rock may not be the remnant of a laccolith. At other localities, such as in the Henry Mountains and other isolated mountain ranges of the Colorado Plateau, some intrusions demonstrably have shapes of laccoliths. The small Barber Hill syenite-stock laccolith in Charlotte, Vermont, has several volcanic trachyte dikes associated with it. Molybdenite is also visible in outcrops on this exposed laccolith. In Big Bend Ranch State Park, at the southwesternmost visible extent of the Ouachita orogeny, lies the Solitario. It consists of the eroded remains of a laccolith, presumably named for the sense of solitude that observers within the structure might have, due to the partial illusion of endless expanse in all directions.One of the largest laccoliths in the United States is Pine Valley Mountain in the Pine Valley Mountain Wilderness area near St. George, UtahThere are many examples of possible laccoliths on the surface of the Moon. These igneous features may be confused with impact cratering.".
- Laccolith thumbnail Laccolith.svg?width=300.
- Laccolith wikiPageExternalLink B2158.pdf.
- Laccolith wikiPageID "1102649".
- Laccolith wikiPageRevisionID "539720682".
- Laccolith hasPhotoCollection Laccolith.
- Laccolith subject Category:Igneous_rocks.
- Laccolith subject Category:Petrology.
- Laccolith subject Category:Sheet_intrusions.
- Laccolith type Abstraction100002137.
- Laccolith type ChangeOfLocation107311115.
- Laccolith type Entrance107370125.
- Laccolith type Event100029378.
- Laccolith type Happening107283608.
- Laccolith type IgneousRock114931879.
- Laccolith type IgneousRocks.
- Laccolith type Invasion107429976.
- Laccolith type Material114580897.
- Laccolith type Matter100020827.
- Laccolith type Movement107309781.
- Laccolith type Part113809207.
- Laccolith type PhysicalEntity100001930.
- Laccolith type PsychologicalFeature100023100.
- Laccolith type Relation100031921.
- Laccolith type Rock114696793.
- Laccolith type SheetIntrusions.
- Laccolith type Substance100019613.
- Laccolith type YagoPermanentlyLocatedEntity.
- Laccolith comment "A laccolith is a sheet intrusion (or concordant pluton) that has been injected between two layers of sedimentary rock. The pressure of the magma is high enough that the overlying strata are forced upward, giving the laccolith a dome or mushroom-like form with a generally planar base.Laccoliths tend to form at relatively shallow depths and are typically formed by relatively viscous magmas, such as those that crystallize to diorite, granodiorite, and granite.".
- Laccolith label "Laccoliet".
- Laccolith label "Laccolite".
- Laccolith label "Laccolite".
- Laccolith label "Laccolith".
- Laccolith label "Lacolito".
- Laccolith label "Lacólito".
- Laccolith label "Lakkolit".
- Laccolith label "Lakkolith".
- Laccolith label "Лакколит".
- Laccolith sameAs Lakolit.
- Laccolith sameAs Lakkolith.
- Laccolith sameAs Lacolito.
- Laccolith sameAs Laccolite.
- Laccolith sameAs Laccolite.
- Laccolith sameAs Laccoliet.
- Laccolith sameAs Lakkolit.
- Laccolith sameAs Lacólito.
- Laccolith sameAs m.046585.
- Laccolith sameAs Q522464.
- Laccolith sameAs Q522464.
- Laccolith sameAs Laccolith.
- Laccolith wasDerivedFrom Laccolith?oldid=539720682.
- Laccolith depiction Laccolith.svg.
- Laccolith isPrimaryTopicOf Laccolith.
