Description
The Crozet Islands, or Crozet Archipelago, contain two main islands, Ile de l'Est and Ile de la Possession (Est and Possession Island). Several smaller islands also make up the archipelago. Although the two main islands were formed by volcanic activity approximately 8 million years ago, the land surface is relatively young as the result of volcanic activity that continued until the Quaternary Period. Ile de la Possession is the site of a scientific base, established around 1960. The point on the island is 934 m in elevation. Like the other Sub Antarctic islands, the Crozet Islands experience a fierce climate of strong winds and high precipitation, the influence of the Westerly circulation belt (Westerlies). On average, winds exceed 100 km/h (60 mph) 100 days a year. It rains an average of 300 days a year and temperatures may rise to 18°C (64°F) in summer and seldom go below 5°C (41°F) in winter.
Sites for
Crozet Islands
- Ile de la Possession (soil), Crozet Archipelago
- Ile de la Possession (moss), Crozet Archipelago
- Ile de la Possession (moist habitats), Crozet Archipelago
Diatom taxa found in
Crozet Islands
- Achnanthes muelleri
- Achnanthes naviformis
- Achnanthidium minutissimum
- Achnanthidium modestiforme
- Adlafia bryophila
- Adlafia bryophiloides
- Adlafia frenotii
- Adlafia linearis
- Adlafia minuscula
- Amphora copulata
- Amphora veneta
- Aulacoseira distans
- Caloneis aff. silicula var. minuta
- Caloneis cf. bacillum
- Caloneis delphineae
- Caloneis marnieri
- Cavernosa kapitiana
- Cavinula heterostauron
- Cavinula heterostauron var. rostrata
- Chamaepinnularia aerophila
- Chamaepinnularia aliena
- Chamaepinnularia australomediacris
- Chamaepinnularia evanida
- Chamaepinnularia gracilistriata
- Chamaepinnularia soehrensis var. muscicola
- Chamaepinnularia sp.#2
- Cocconeis neothumensis
- Cosmioneis grossepunctata
- Craticula salsuginosa
- Craticula submolesta
- Craticula vixneglidenda
- Cyclotella meneghiniana
- Cymbopleura naviculiformis
- Denticula sundayensis
- Diadesmis arcuata
- Diadesmis comperei
- Diadesmis contenta
- Diadesmis costei
- Diadesmis crozetikerguelensis
- Diadesmis faurei
- Diadesmis ingeae
- Diadesmis langebertalotii
- Diadesmis latestriata
- Diadesmis subantarctica
- Diadesmis vidalii
- Diatomella balfouriana
- Diploneis subovalis
- Encyonema silesiacum
- Encyonema vulgare
- Eolimna minima
- Eucocconeis aretasii
- Eunotia fallax
- Eunotia muscicola var. muscicola
- Eunotia paludosa var. paludosa
- Eunotia sp.#1
- Fallacia lenzii
- Fragilaria capucina s.l.
- Fragilaria germainii
- Fragilaria germainii f. acostata
- Fragilaria husvikensis
- Fragilaria pulchella
- Frankophila maillardii
- Frustulia cirisiae
- Frustulia pulchra
- Frustulia subantarctica
- Frustulia vulgaris
- Geissleria paludosa Morphotype II
- Geissleria subantarctica
- Geissleria taafiana
- Gomphonema affine var. affine
- Gomphonema exilissimum
- Gomphonema parvulum var. parvulum
- Gomphonema possessionense
- Gomphonema stonei
- Gomphonema subantarcticum
- Hantzschia amphioxys
- Hantzschia possessionensis
- Hippodonta hungarica
- Kobayasiella subantarctica
- Lecohuia geniculata
- Luticola aff. mutica
- Luticola ledeganckii
- Luticola muticopsis
- Luticola paramutica var. binodis
- Luticola robusta
- Luticola suecorum
- Mayamaea atomus var. atomus
- Mayamaea atomus var. permitis
- Mayamaea fossalis var. fossalis
- Melosira aff. guillauminii
- Melosira dickiei
- Melosira echinata
- Morphotype 1 cf. F. cap. var. vaucheriae
- Morphotype 2 cf. F. cap. var. rumpens
- Morphotype 3 cf. F. cap. var. gracilis
- Muelleria luculenta
- Muelleria varipunctata
- Navicula arvensis
- Navicula bicephala
- Navicula ectoris
- Navicula elorantana
- Navicula gregaria
- Navicula seminulum
- Navicula sp.#1
- Navicula sp.#1
- Navicula sp.#2
- Navicula veneta
- Navicula venetiformis
- Neidium aubertii
- Nitzschia acidoclinata
- Nitzschia aff. tubicola
- Nitzschia angustatula
- Nitzschia archibaldii
- Nitzschia chardezii
- Nitzschia clausii
- Nitzschia communis
- Nitzschia debilis
- Nitzschia dissipata var. media
- Nitzschia fonticola
- Nitzschia frustulum var. frustulum
- Nitzschia gracilis
- Nitzschia hungarica
- Nitzschia inconspicua
- Nitzschia liebetruthii var. liebetruthii
- Nitzschia palea
- Nitzschia palustris
- Nitzschia pusilla
- Nitzschia sp.#1
- Nupela chilensis
- Opephora naveana
- Orthoseira biportulata
- Orthoseira roeseana
- Pinnuavis elegans
- Pinnuavis gebhardii
- Pinnuavis genustriata
- Pinnularia acidicola var. acidicola
- Pinnularia acidicola var. elongata
- Pinnularia aff. perirrorata
- Pinnularia alpiniformis
- Pinnularia amae
- Pinnularia angliciformis
- Pinnularia borealis var. scalaris
- Pinnularia bottnica
- Pinnularia carteri
- Pinnularia cf. microstauron var. nonfasciata
- Pinnularia crozetii
- Pinnularia cuneorostrata
- Pinnularia decrescens var. kerguelenensis
- Pinnularia divergentissima var. divergentissima
- Pinnularia divergentissima var. minor
- Pinnularia dulcicola
- Pinnularia extralonga
- Pinnularia kerguelensis
- Pinnularia kolbei
- Pinnularia laperousei
- Pinnularia lecohui
- Pinnularia microstauron var. microstauron
- Pinnularia microstauron var. rostrata
- Pinnularia neomajor
- Pinnularia obscura
- Pinnularia peracuminata
- Pinnularia petersenii
- Pinnularia pisciculus
- Pinnularia rabenhorstii var. franconica
- Pinnularia rabenhorstii var. rabenhorstii
- Pinnularia rabenhorstii var. raphecurvata
- Pinnularia rabenhorstii var. subantarctica
- Pinnularia rhombarea var. serrata
- Pinnularia sagittiformis
- Pinnularia schoenfelderi
- Pinnularia subantarctica
- Pinnularia subantarctica var. elongata
- Pinnularia subcommutata
- Pinnularia vatii
- Pinnularia viridiformis
- Pinnularia viridiformis var. minor
- Planothidium aueri
- Planothidium cyclophorum
- Planothidium delicatulum
- Planothidium densistriatum
- Planothidium lanceolatum
- Planothidium marginostriatum
- Planothidium quadripunctatum
- Planothidium renei
- Psammothidium abundans
- Psammothidium confusiforme
- Psammothidium confusum
- Psammothidium confusum var. atomoides
- Psammothidium germainii
- Psammothidium incognitum
- Psammothidium investians
- Psammothidium levanderi
- Psammothidium manguinii
- Psammothidium oblongellum
- Psammothidium stauroneioides
- Psammothidium subatomoides
- Psammothidium therezienii
- Rhopalodia rupestris
- Sellaphora subantarctica
- Sellaphora tumida
- Stauroforma exiguiformis
- Stauroneis aff. phoenicenteron
- Stauroneis cf. anceps
- Stauroneis gracilior
- Stauroneis kriegeri
- Stauroneis muriella
- Stauroneis obtusa
- Stauroneis obtusa var. minor
- Stauroneis smithii var. sagitta
- Stauroneis subgracilis
- Staurosira alpestris
- Staurosira circula
- Staurosira jolinae
- Staurosira leptostauron
- Staurosira martyi
- Staurosira pinnata
- Staurosira venter
- Surirella angusta var. constricta
- Tabularia fasciculata
See: Overview maps
Image courtesy of the Earth Sciences and Image Analysis Laboratory, NASA Johnson Space Center.
