Feeder dike intruding tephra, Iceland
intrusive igneous
Diabase dike intruding metaconglomerate, NE Maine
igneous, intrusive, intrusion, mafic
Apophysis of basaltic intrusion in granite
igneous, intrusive, intrusion, mafic
Pyroclastics of 3.5Ka Minoan eruption, Santorini
tephra, students
Andesitic dike, New Zealand
dyke, intrusion
Columnar-jointed basalt, Oregon
lava, dwshed
Pegmatite dike cutting schist, Montana
intrusion, intrusive, metamorphic, Archean, precambrian
Mafic Dikes intruding Limestone
intrusion, intrusive, igneous
Cinder cone and flow, California
volcanic, igneous
Purcell sill, Glacier National Park, Montana.
igneous, intrusive, intrusion, Precambrian
Garnet Peridotite hand sample
specimen, igneous, intrusive
Granite sill intruding gneiss, Colorado.
igneous, intrusive
Diabase sill in marble, California
igneous, intrusive
Pegmatite dike in granitic rock.
granite, igneous, intrusive, minerals
Composite dike
igneous, intrusive
Pegmatite intruding gneiss , California
sill, dike, igneous intrusion, intrusive
Intrusive contact: southern Sierra Nevada.
igneous, intrusive
Ash Flow tuff, Crater Lake, (vertical)
differential erosion, volcanic, pyroclastic, weathering, RGO