Podocarp distribution in Africa follows a discontinuous mountainous belt from Cameroon to Angola in the west and from Ethiopia in the northeast to the southern Cape in South Africa. Besides a relict population of Afrocarpus falcatus in coastal lowland forest in northeastern South Africa and southern Mozambique, African podocarps are generally limited to highland (Afrotemperate) regions. All pod...

0019-1035/$ see front matter 2011 Elsevier Inc. A doi:10.1016/j.icarus.2011.03.029 ⇑ Corresponding author. Fax: +1 401 863 3978. E-mail address: [email protected] (S.J. Kadi An outstanding question in Mars’ climate history is whether or not pedestal craters represent the armored remnants of ice-rich paleodeposits. We address this question using new high-resolution images; in a survey of sev...

Introduction: Olympus Mons is the largest volcano on Mars, rising over 25 km above the surrounding plains and with a basal diameter greater than 600 km. It is surrounded by a basal escarpment up to 6 km tall. Extending up to 1000 km beyond this scarp are lobes of ridged materials known as the aureole [1, 2]. Superimposed upon the west and northwest aureole deposits at the base of the escarpment...

Abstract. The Greater Caucasus mountain belt is characterized by deep valleys, steep slopes and frequent seismic activity, the combination of which results in major landslide hazard. Along eastern side Enguri water reservoir lies active Khoko landslide, whose head scarp zone affects important Jvari–Khaishi–Mestia road, one few connections with interior Caucasus. Here, we present a database meas...

Fan-shaped sedimentary landforms on Mars are important geomorphic markers of past water flow and characterizing the distribution morphology these features can yield insights into planet's climatic evolution. We present a new database 1501 martian fan-shaped that builds upon previous surveys uses Context Camera images. This comprehensive global survey includes both alluvial fans putative deltas,...