Earth science
Articles about geology, climate, oceans and the planet.
Middle Jurassic
Middle Triassic
Milankovich cycle
Mineral
Mineral: naturally occurring inorganic solids and their study
Mineral exploration
Mineral water
Mineralogy
Mineralogy: study of minerals, their properties, and uses
Mining
Miocene
Mississippian (geology)
Mohs scale of mineral hardness
Moment magnitude scale
Morrison Formation
Mount Agung
Mount Agung — Bali's highest mountain and active volcano
Mount Alayta
Mount Baker
Mount Baker (Koma Kulshan): Stratovolcano in Washington State
Mount Batur
Mount Bulusan
Mount Buninyong
Mount Cayley
Mount Cayley: eroded stratovolcano in British Columbia's Garibaldi Belt
Mount Cayley volcanic field
Mount Cayley volcanic field (British Columbia)
Mount Cheaha
Mount Cheaha — Highest Point in Alabama
Mount Chimborazo
Mount Edziza
Mount Edziza volcanic complex, British Columbia
Mount Erebus
Mount Erebus (Antarctica)
Mount Etna
Mount Garibaldi
Mount Meager
Mount Pinatubo
Mount Pinatubo: 1991 eruption, features, impacts and recovery
Mount Rainier
Mount Rainier: geology, history, ecology, and recreation
Mount Redoubt
Mount Rinjani
Mount Rinjani (Gunung Rinjani), Lombok, Indonesia
Mount Rowan
Mount Rowan: extinct volcano near Ballarat, Victoria
Mount Ruapehu
Mount Shasta
Mount Shasta: geology, glaciers, history, and human significance
Mount Silverthrone
Mount Tambora
Mount Unzen
Mount Unzen (Unzen-dake) — active volcanic complex on Kyūshū, Japan
Mount Vesuvius
Mud volcano
Mudflow
Mudrock
Mudstone
Mudstone: a fine-grained siliciclastic sedimentary rock
Murchison meteorite
National Hurricane Center
National Hurricane Center: role, functions, and public guidance
Nazca plate
Nazko Cone
Nazko Cone — cinder cone of the Anahim Volcanic Belt, British Columbia
Neoarchaean
Neoarchaean Era: final stage of the Archaean (2.8–2.5 billion years ago)