Formations beginning with M
382 names, each with a page of its own for the fossils recorded from it. The list is what this site has looked up and cached, not every formation the record holds.
- Maadi
- Maastricht
- Maastrichtian chalk
- Maboko
- Machari
- Machias
- Machigarskaya
- Macocha
- Madaoyu
- Madbi
- Madeline
- Madera
- Madera Limestone
- Madison Valley
- Madumabisa Mudstone
- Madygen
- Maecuru
- Maéjima
- Maevarano
- Magdalena
- Magdalena Limestone
- Magian
- Magiveem
- Magyaregregy Conglomerate
- Mahantango
- Maidiping
- Mailonggang
- Main Street Limestone
- Maiolica
- Maissade
- Maíz Gordo
- Majiagou
- Majiaoling
- Makah
- Makapansgat
- Makatini
- Mal Paso
- Malbina
- Maldegem
- Malembo
- Maleri
- Malokinelskaya
- Malongulli
- Maltsevo
- Malua
- Mamara
- Mammaliferous Crag
- Manantial
- Manasquan
- Manchar
- Manchioneal
- Mancora
- Mancora Tablazo
- Mancos
- Mancos Shale
- Manda Beds
- Mandagery Park
- Mandrikovka
- Mandul Marl
- Mangarewa
- Mangazea
- Maniobra
- Manistique
- Manix
- Maniyara Fort
- Manlius
- Mannie
- Manse Burn
- Mantou
- Manuel Creek
- Manykay
- Mao
- Mao Adentro
- Maochuang
- Maokou
- Maping
- Maqam
- Maquoketa
- Maradah
- Maradana Shale
- Maraldi Sandstone
- Marar
- Marcellus
- March
- Marcou
- Mare
- Marelb
- Margaret
- Mariana Limestone
- Marianna Limestone
- Marias River Shale
- Marília
- Mariposa
- Mariposas
- Marjum
- Marjum Limestone
- Markley
- Marks Head
- Marmarotrapeza
- Marmolata
- Marna di Possagno
- Marne di Priabona
- Marnes à Spongiaires
- Marnes à Toxaster
- Marnes bleues
- Marnes Bleues
- Marnes d'Auzas
- Marnes de Donzacq
- Marnes de Foncouverte
- Marnes de Fontaneilles
- Marnes de Gan
- Marnes de Latrecey
- Marnes de Lestaillats
- Marnes de Miretrain
- Marnes de Saint-Etienne-d’Orthe
- Marnes de Smail
- Marnes Rouges Inférieures
- Marno-Calcaires à Gauthiericeras
- Marno-calcaires à Heteraster oblongus
- Marrat
- Marshalltown
- Marsland
- Marta
- Marthaville
- Martin
- Martin Bridge
- Martin Bridge Limestone
- Martinez
- Martinsburg
- Maruyamskaya
- Mascall
- Mason Porcus
- Mason River
- Massenkalk
- Masuk
- Mata Amarilla
- Matabaietu
- Matam
- Matanuska
- Matilija
- Matmor
- Matoppa
- Mattoon
- Matulla
- Matuo
- Maubisse
- Mauch Chunk
- Maude
- Maut
- Maxville Limestone
- Mayatas
- Maynes Creek
- Mazantic Shale
- Mazaterón
- Mbuga Clays
- McAlester
- McBean
- McCann Hill
- McCloud
- McCloud Limestone
- McColley Canyon
- McCoy
- McCoy Brook
- McCraney Limestone
- McGregor
- McGregor Creek
- McIvor
- McKay
- McKenzie
- McMillan
- McMonnigal Limestone
- McPherson
- Meadowtown Beds
- Meads Creek equivalent
- Mechra Ben Abbou
- Medvezhin
- Medvezhya
- Medvezhyn
- Megaerella
- Meganos
- Megarella
- Mehrten
- Meinkenbracht
- Meisenheim
- Meitan
- Mekran
- Melovatka
- Melville
- Ménaka
- Menat
- Menefee
- Menevia
- Meniér
- Menilite
- Menuha
- Mera
- Merced
- Merchantville
- Mergel and Kalk Zone
- Meride
- Merizo
- Merlinleigh Sandstone
- Mernmerna
- Merrimack
- Mesa
- Mesaverde
- Meshikuni
- Messel
- Mexcala
- Mia Le
- Miamitown
- Mianwali
- Miaokao
- Miaoling
- Miaopo
- Michoud
- Midawara
- Middle Calcareous Grit
- Middle Chalk
- Middle Elton
- Middle Haborogawa
- Middle Kimmeridge marls
- Middle Lias
- Middle Limestone V
- Middle Limestone V Cyclothem
- Middle Sakamena
- Middle Shaly Facies
- Midway
- Mifflin
- Mikasa
- Mikasa Sandstone
- Mikin
- Mikkwa
- Mila
- Milas
- Milburn Limestone
- Milina
- Milk River
- Milldale Limestone
- Millport equivalent
- Milwaukee
- Mingan
- Mingenew
- Minghsingssu
- Minhe
- Minija
- Mint Spring
- Minturn
- Miramar
- Mirambel
- Miravetes
- Miretrain Marl
- Miri
- Miria
- Mirkin
- Misfah
- Mishash
- Mission Valley
- Mistaya
- Mitarai
- Mitina
- Mitkov Beds
- Miyajima
- Miyara
- Miyata
- Mizozono
- Mocuio
- Modder River Siltstone
- Modelo
- Moe
- Moel Hiraddug Limestone
- Moenave
- Moenkopi
- Moghara
- Mogotuin
- Mogyorósdomb Limestone
- Moin
- Mojado
- Mojon de Hierro
- Mokattam
- Molare
- Molles
- Molteno
- Momonoki
- Monarch Mill
- Moneague
- Monforte
- Moniello
- Monola
- Monroe Canyon
- Monroe Creek
- Monsal Dale Limestone
- Mont Peyroux
- Mont Wissick
- Monte Cristo
- Monte Giogo
- Monte Hermoso
- Monte Leon
- Monte Leon Fm
- Monte Vaticano
- Monte Zugna
- Monteagle Limestone
- Monterey
- Montezuma
- Moodys Branch
- Moonkinu
- Moorefield
- Mooreville Chalk
- Moreno
- Moribu
- Morkvashi
- Morne l'Enfer
- Mörnsheim
- Morridge
- Morrison
- Morzhovaya Bay
- Mosalem
- Moscow
- Moshi Sandstone
- Mospyne
- Mossen
- Most
- Mostyn Vale
- Motianling
- Motol
- Mount Auburn
- Mount Brown
- Mount Cap
- Mount Crosby
- Mount Harris
- Mount Hawk
- Mount Head
- Mount Hope
- Mount Ida
- Mount Laurel
- Mount Laurel Sand
- Mount Whyte
- Moyerokan
- Moyuela
- MR Caliente
- Mt Brown "E" Limestone
- Mt. Lysa
- Mt. Whyte
- Muav Limestone
- Much Wenlock
- Much Wenlock Limestone
- Muddy Creek
- Muddy Sandstone
- Mughanniyya
- Muhu
- Muhua
- Muksha subsuite
- Muksha Subsuite
- Mukut
- Mulanguiñeu
- Mulde Beds
- Muldraugh
- Mulege
- Mulloch Hill
- Muñani
- Munday’s Hill Phosphatic Sandstone
- Mungo River
- Munguidó
- Munugudzhak
- Mural
- Mural Limestone
- Muree
- Murero
- Murfreesboro Limestone
- Murphy Road
- Murray Island
- Murray Ridge
- Muschelkalk
- Mushirebuca
- Myaring Beds
- Mynaral
- Myrtle
- Myslejovice
- Mytilinii
- Mytton Flags
- Mytton Flags and Tankerville
- Mzinene