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aeolian

presentasi
by

Jabnu Ismail

on 10 November 2012

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Transcript of aeolian

photo credit Nasa / Goddard Space Flight Center / Reto Stöckli AEOLIAN Aeolian merupakan bentuk lahan yang terbentuknya dipengaruhi oleh angin yang berada di sekitarnya. AEOLIAN Syarat-Syarat Berkembangnya Lahan Aeolian : 1. Tersedia material berukuran pasir halus-kasar dalam jumlah banyak.
2. Adanya periode kering yang panjang dan tegas.
3. Adanya angin yang mampu mengangkat dan mengendapkan bahan pasir tersebut.
4. Gerakan angin tidak banyak terhalang oleh vegetasi/objek lain. Proses Terbentuknya Lahan Aeolian Korasi (corrasion) (cc) photo by theaucitron on Flickr Pengendapan oleh Angin Pengikisan oleh Angin Korasi (corrasion) Deflasi (deflation) Atrisi (attrition) Polishing
pittin
Grooving
shaping
Faceting hasil proses korasi : a. Bevelad stone
b. Polish
c. Grooves
d. Sculpturing(Penghiasan) hasil proses deflasi dibedakan menjadi 3 1. Cekungan deflasi (deflation basin)
2. Lag gravel
3. Desert varnish Deflasi (deflation) Pengangkutan materi oleh Angin

Rayapan permukaan (surface crep) Suspensi (suspension) Saltasi (saltation) Tipe-Tipe Endapan Pasir Bentuk skala kecil
Bentuk skala besar
Whalebacks (tanggul pasir)
Undulation
Sand sheets
Draa (megadune) Bentuk Lahan Hasil Aeolian Bentuk-bentuk hasil erosi angin: 1. Desert pavement(pebble armor) 2. Blow out 3. Ventifact 4. Dreikanter 5. Groove 6. Yardang 7. Pan Bentuk-Bentuk Hasil Pengendapan Angin 1. Loess 2. Endapan pasir 3. Gumuk pasir/ bukit pasir (dunes) Sand sheet ripple (riak) sand shadow Sand fall Sand drift Struktur bukit pasir b. Gumuk pasir melintang
(transversal dunes) c. Gumuk pasir parabolik
(parabolic dunes) d. Gumuk pasir memanjang
(longitudinal dunes/seif) e. Whaleback dunes a. Gumuk pasir sabit (barchan) 1. Cross bedding 3. Quick sand
(lumpur hidup) 2. Lamination TERIMA KASIH
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