Monmouth Creek complex

{{Infobox mountain

| name = Monmouth Creek complex

| photo =

| photo_caption =

| elevation_m = 510

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| location = British Columbia, Canada

| range = Pacific Ranges

| district = New Westminster Land District

| map = Canada British Columbia

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| label = Monmouth Creek complex

| label_position = right

| mapframe = yes

| mapframe-zoom = 11

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| coordinates = {{coord|49|41|38|N|123|11|49|W|type:mountain_region:CA-BC_scale:100000|format=dms|display=inline,title}}

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| topo_maker = NTS

| topo_map = {{Canada NTS Map Sheet|92|G|11}}

| type =

| age = Unknown{{cite book|last1=Smellie|first1=J.L.|last2=Chapman|first2=Mary G.|page=201|title=Volcano-Ice Interaction on Earth and Mars|year=2002|publisher=Geological Society of London|isbn=1-86239-121-1}}

| volcanic_arc/belt = Cascade Volcanic Arc{{clear}}Garibaldi Volcanic Belt

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The Monmouth Creek complex is a volcanic complex in southwestern British Columbia, Canada, located {{Convert|4|km|mi|abbr=on}} southwest of the community of Squamish on the west side of the Squamish River mouth. It lies in the southern Pacific Ranges of the Coast Mountains and is part of the Squamish volcanic field in the southern Garibaldi Volcanic Belt, which represents the northernmost extension of the Cascade Volcanic Arc.

Its prominent and enigmatic edifice is composed of basaltic andesite to dacite of unknown age and may represent a group of dikes and lava domes that formed subglacially. At least four dikes protrude its summit.{{cite book|last1=Kelman|first1=M.C.|last2=Russell|first2=J.K.|last3=Hickson|first3=C.J.|page=197|title=Effusive intermediate glaciovolcanism in the Garibaldi volcanic belt, southwestern British Columbia, Canada|year=2002|publisher=Geological Survey of Canada|location=101-605 Robson Street, Vancouver, British Columbia V6B 5J3, Canada}} These form the ribs of {{Convert|60|m|ft|abbr=on}} to {{Convert|180|m|ft|abbr=on}} high lava spines, the tallest being The Castle, which contains horizontal and radiating columnar joints. The spines are covered by welded breccia close to their bases and columnar jointing extends into the welded sequence. The most elevated lava flows and spines are composed of dacite.