This paper subscribes to the concept of Key Geoheritage Area (KGA) which is currently being developed. Three localities in northeast Brazil are described as possible candidates for KGA. They represent the diversity of erosional granite landscapes found in cratonic areas. Pedra da Boca is an impressive cluster of tall domes rising from the marginal escarpment of Borborema Plateau, with gigantic tafoni. Pai Mateus is located on the Borborema Plateau and consists of a group of low granite elevations (ruware, whalebacks) with residual boulders scattered on their surfaces. These boulders are hollowed out by weathering, providing another very distinctive type of tafoni. Quixadá area is an inselberg landscape, with a few dozens of bedrock hills rising from the plain. Among minor features, karren are ubiquitous. Collectively, these three sites show different types of cratonic granite scenery, a multitude of medium-size and minor geomorphic features, and illustrate pathways for inselberg formation and decay through long-term weathering and erosion. Therefore, they are considered to fit the concept of KGA. In addition, each landscape has considerable aesthetic and scenic values, with great potential for geotourism and geoeducation. Nevertheless, their current conservation status is low and geointerpretation nearly nonexistent and these challenges are to be addressed in the future.

中文翻译：

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Pedra da Boca，Pai Mateus和Quixadá-巴西东北部三个可能的主要地质遗迹

本文赞同当前正在开发的关键地理继承区（KGA）的概念。巴西东北部的三个地区被描述为KGA的可能候选人。它们代表在克拉通地区发现的侵蚀性花岗岩景观的多样性。佩德拉·达·博卡（Pedra da Boca）是高耸的圆顶群，由博博瑞玛高原（Borborema Plateau）的边缘悬崖和巨大的塔夫尼（tafoni）升起。Pai Mateus位于Borborema高原上，由一组低矮的花岗岩高程（粗陶，鲸鱼）组成，表面残留有巨石。这些巨石因风化作用而被挖空，提供了另一种非常独特的意大利宽面条。Quixadá地区是一个inselberg景观，平原上有数十座基岩山丘。在次要特征中，卡伦无处不在。总的来说，这三个地点显示出不同类型的克拉通花岗岩风光，大量中等大小和次要的地貌特征，并说明了因长期风化和侵蚀而形成的Inselberg形成和衰变的途径。因此，它们被认为符合KGA的概念。此外，每个景观都具有相当大的美学和风景价值，具有进行地质旅游和地理教育的巨大潜力。然而，它们目前的保护状况很差，几乎没有地理解释，这些挑战将在将来解决。每个景观都具有可观的美学和风景价值，并具有进行地质旅游和地理教育的巨大潜力。然而，它们目前的保护状况很差，几乎没有地理解释，这些挑战将在将来解决。每个景观都具有可观的美学和风景价值，具有进行地质旅游和地理教育的巨大潜力。然而，它们目前的保护状况很差，几乎没有地理解释，这些挑战将在将来解决。