Ko te Siderite he kohuke diagenetic noa i roto i te shales me te sandstones, i reira i te tahi mau taime hanga reira concretions, e taea te uhi i toru-ahu te tiaki kohuke. I roto i te toka sedimentary, Siderite hanga noa i te hohonu tanumanga matao, me tona hanganga huānga e pā ana ki te taiao whakatakotoranga o te tākai e karapoti ana. I tua atu, kua whakamahia e te maha o ngā rangahau tata te hanganga hāora isotopic o sphaerosite (momo Aider pā ana ki oneone) rite te takawaenga mo te hanganga isotopic o te wai meteoric i muri tata i te whakatakotoranga. Pātai: Kei hea te kohuke kitea noa?
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