Question

Why thickness of lithosphere is fragile​

Answer 1

Answer:

ʟɪᴛʜᴏꜱᴘʜᴇʀɪᴄ ᴅᴇɴꜱɪᴛʏ ᴀɴᴅ ᴛʜɪᴄᴋɴᴇꜱꜱ ᴠᴀʀɪᴀᴛɪᴏɴꜱ ᴀʀᴇ ɪᴍᴘᴏʀᴛᴀɴᴛ ᴄᴏɴᴛʀɪʙᴜᴛᴏʀꜱ ᴛᴏ ᴛʜᴇ ꜱᴛᴀᴛᴇ ᴏꜰ ꜱᴛʀᴇꜱꜱ ᴏꜰ ᴛʜᴇ ᴘʟᴀᴛᴇꜱ. ᴛʜᴇ ʀᴇʟᴀᴛɪᴏɴꜱʜɪᴘ ʙᴇᴛᴡᴇᴇɴ ᴛʜᴇ ʟɪᴛʜᴏꜱᴘʜᴇʀᴇ′ꜱ ɪꜱᴏꜱᴛᴀᴛɪᴄ ꜱᴛᴀᴛᴇ, ꜱᴜʙᴄʀᴜꜱᴛᴀʟ ꜱᴛʀᴜᴄᴛᴜʀᴇ ᴀɴᴅ ꜱᴛʀᴇꜱꜱ ꜰɪᴇʟᴅ, ʜᴏᴡᴇᴠᴇʀ, ʀᴇᴍᴀɪɴꜱ ᴜɴʀᴇꜱᴏʟᴠᴇᴅ ᴅᴜᴇ ᴛᴏ ᴛʜᴇ ᴜɴᴄᴇʀᴛᴀɪɴᴛɪᴇꜱ ᴏɴ ɪᴛꜱ ᴛʜɪᴄᴋɴᴇꜱꜱ, ᴄᴏᴍᴘᴏꜱɪᴛɪᴏɴ ᴀɴᴅ ʀʜᴇᴏʟᴏɢʏ. ᴛᴏ ꜱᴛᴜᴅʏ ᴛʜᴇ ɪɴꜰʟᴜᴇɴᴄᴇ ᴏꜰ ʟɪᴛʜᴏꜱᴘʜᴇʀɪᴄ ꜱᴛʀᴜᴄᴛᴜʀᴇ ᴏɴ ɪɴᴛʀᴀᴘʟᴀᴛᴇ ꜱᴛʀᴇꜱꜱᴇꜱ, ᴡᴇ ᴜꜱᴇ ᴀ ɴᴇᴡ ᴍᴏᴅᴇʟ ᴏꜰ ɢʟᴏʙᴀʟ ʟɪᴛʜᴏꜱᴘʜᴇʀɪᴄ ꜱᴛʀᴜᴄᴛᴜʀᴇ (ᴛᴅʟ) ᴛʜᴀᴛ ᴀᴄᴄᴏᴜɴᴛꜱ ꜰᴏʀ ᴛʜᴇ ᴘʀᴇꜱᴇɴᴄᴇ ᴏꜰ ᴅᴇᴘʟᴇᴛᴇᴅ ᴍᴀɴᴛʟᴇ ᴛᴏ ᴇxᴘʟᴏʀᴇ ᴛʜᴇ ᴇꜰꜰᴇᴄᴛꜱ ᴏꜰ ɪꜱᴏꜱᴛᴀᴛɪᴄ ᴄᴏᴍᴘᴇɴꜱᴀᴛɪᴏɴ, ᴍᴀɴᴛʟᴇ ᴅᴇɴꜱɪᴛʏ ꜱᴛʀᴜᴄᴛᴜʀᴇ, ʟɪᴛʜᴏꜱᴘʜᴇʀɪᴄ ᴛʜɪᴄᴋɴᴇꜱꜱ (ʙᴀꜱᴇ ᴅᴇᴘᴛʜ) ᴀɴᴅ ᴍᴇᴄʜᴀɴɪᴄᴀʟ ᴄᴏᴜᴘʟɪɴɢ ᴡɪᴛʜɪɴ ᴛʜᴇ ʟɪᴛʜᴏꜱᴘʜᴇʀᴇ ᴏɴ ᴡᴀᴠᴇʟᴇɴɢᴛʜꜱ >200 ᴋᴍ.

Explanation:

☞￣ᴥ￣☞ᎻϴᏢᎬ ᎷᎽ ᎪΝՏᏔᎬᎡ ᏆՏ ᎻᎬᏞᏢҒႮᏞ ҒϴᎡ ᎽϴႮ(◕ᴗ◕✿)

Answer 2

$\huge\tt\dag\underline{Answer}:$

As the oceanic lithosphere cools, undepleted mantle becomes part of the lithospheric column and its thickness increases with age. For continents, the picture is less clear and the composition of the continental mantle lithosphere likely varies strongly as a function of tectonic province.

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