The genesis of an ocean: in plate tectonics, the formation of an ocean starts with a rifting process in the crust as a result of mantle convection. A valley forms like the African Rift Valley beeing a recent example. In the next stage, the valley has opened up until sea water enters; a good example is the Red Sea. The spreading process continues, the ocean becomes wider and forms a mature ocean like the Atlantic.
an saothar seo a roinnt – an saothar seo a chóipeáil, a dháil amach, agus a tharchur
an saothar seo a athmheascadh – an saothar seo a oiriúnú
Ach amháin má leantar na coinníollacha seo a leanas:
sannadh – Ní mor creidiúint a thabhairt leis an saothar, faoi mar a shonraigh an údar nó tabharthóir an ceadúnais (ach ná húsáid modh a thugann le fios go thacaíonn sé/sí tú féin nó an úsáid a bhaineann tú as an saothar).
comhroinn araon – Má athraíonn tú nó síneann tú amach an saothar seo, ní féidir é a dháileadh ach amhaín faoin gceadúnas céanna nó ceann cosúil leis an gceann seo.
2007-06-23T08:59:14Z Hgrobe 806x1155 (134410 Bytes) {{Information |Description=to be defined |Source=own work |Date=2007-06-20 |Author=~~~~, Alfred Wegener Institute for Polar and Marine Research, Bremerhaven, Germany |Permission=Own work, share alike, attribution required (Cr
2007-06-20T19:13:21Z Hgrobe 806x1155 (134410 Bytes) {{Information |Description=to be defined |Source=own work |Date=2007-06-20 |Author=~~~~, Alfred Wegener Institute for Polar and Marine Research, Bremerhaven, Germany |Permission=Own work, share alike, attribution required (Cr
{{Information |Description='''The genesis of an ocean:''' in plate tectonics, the formation of an ocean starts with a rifting process in the crust as a result of mantle convection. A valley forms like the ''African Rift Valley'' beeing a recent example. I
Úsáid comhaid
Tá nasc chuig an gcomhad seo ar na leathanaigh seo a leanas: