简介：FIA广泛地被使用超过一十年了解开变丑和变形难题。因为在岩石中的组合layering总是重新激活多重变丑在哪儿发生了，Orogenic处理在历史或orogenesis挑战科学家期间早发展，几乎不离开在矩阵保存的生叶开发的历史的小证据。在科罗拉多的落基山脉的山麓丘陵，美国如果porphyroblasts没在影响了这些岩石的多重变丑事件期间成长或如果他们旋转了，当这些事件发生了，包含一直不是可区分的四个FIA集合(趋势)的继任。当变丑继续了，他们表明两变丑和isograds的地点划分显著地变化了。

简介：ConstraintsfromP-Tpseudosections(MnNCKFMASHsystem),foliationintersection/inflectionaxespreservedinporphyroblasts(FIAs),mineralassemblagesandtexturalrelationshipsforrockscontainingallthreeAl2SiO5polymorphsindicateakyanite→andalusite→sillimanitesequentialformationatdifferenttimesratherthanstablecoexistenceattheAl2SiO5triplepoint.AllthreeAl2SiO5polymorphsgrewintheChl,Bt,Ms,Grt,St,PlandCrdbearingOrdovicianClayholeSchistinBalcooma,northeasternAustraliaseparatelyalongaloopedP-T-t-Dpaththatswapsfromclockwisetoanticlockwiseinthetectono-metamorphichistoryoftheregion.KyanitegrewduringcrustalthickeninginanEarlySilurianOrogeniceventfollowedbydecompression/heating,andalusiteandfibroliticsillimanitegrowthduringEarlyDevonianexhumation.